Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d32030b8097db9…

MALICIOUS

PDF

134.5 KB Created: 2021-07-01 20:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ded080092185686f3f743854e22773f0 SHA-1: c5ef794f41518d199cc00abfeef05fcfb6440a51 SHA-256: 75d32030b8097db9433e104e7027a0dfd27c25e9ba61b4c73f2c0d8d68558060
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and IP addresses, likely for phishing or malware distribution. Although no scripts were extracted, the embedded URLs and the PDF's structure suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9380

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=rise+of+the+tomb+raider+for+android PDF link annotation
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/8bcc5ae38a158a4c5bf00ca53624957d/tawujudomimidobatatebuta.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/79927883108.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4e92812ac---nakubirazixali.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b50dfd37---38070118044.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/razirobosapabemikeru.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/gesur.pdfIn PDF document text
    • http://shophouse.info/images/files/5482544053.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d4cbca98db9e13a4a537b6f76faa6f27/sasasuwawuvosofutatut.pdfIn PDF document text
    • https://stopserv.ru/files/file/94995910491.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/zezasunosofi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c0e1b32c6---keteruvepidizenet.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/6cdtr3mjep964oj0phtinp51al/seregiza.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/594u7r89jkjo8srgkes2lur5j2/pepisaxegumu.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/37187119662.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/73371314099.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40d80a8044---72307089144.pdfPDF link annotation
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/1896ceb699f4233afcb454a22b1cb483/89268292322.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/357d366a5acad83fa1de448a3f18d400/zelowi.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/11884dd82783b57fa4f6d9b6176b6f5b/45284027620.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b1026a016---gukafigafizajudoxo.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/vigdv9vfrquoeq7mfudm9rt5i1/47685283649.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072099ad6038---nizebidiremalalojab.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bddab045dd---navozipotowapufigari.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb4b30041e---55734746139.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6b82db836e9dafbcc02f509260f3cd2f/95906779237.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac57cda2e---mesupoluxilurazex.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5F2 10760 bytes
SHA-256: 1692e9152744e5eb717d81f678d1f8dc0aaf575ee24d48f75b8857d7105c5ad4
font_02_sfnt_off0001be74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE74 9148 bytes
SHA-256: b35b7954822967af97a9d80b76f1faebd70038b206e0027cc8f530692002e34d
font_03_sfnt_off0001dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD51 17612 bytes
SHA-256: 24e01b4a3aebe5ca1b4b9c0b6e5a4c14e062897d1ed9fd9e6b95ad2a3847782e

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