Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eadf197ff1e74f2…

MALICIOUS

PDF

155.3 KB Created: 2021-07-06 16:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e329e8560b55cb2a6c5c4d412362cf82 SHA-1: 6eafa9cfa75969b882c9b2cad709dee39babb9a3 SHA-256: 5eadf197ff1e74f29913f8bac5c998fd28685a0d238a23d0beffca6b6da72d79
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. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm or redirection mechanism to phishing or malware distribution sites. The presence of these external links aligns with the T1566.001 (Spearphishing Attachment) technique, as such documents are often delivered via email.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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=welcome+home+new+car+quotes PDF link annotation
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/0da3ab707c84f851dffd059e5f5f8091/vujenixene.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/39956485168.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/vscpj3e9iv54mkjbsuehd0bj64/kojinamigepawomepovib.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1688f5d7f095bfa9dbeef3d15392b5e3/85582214283.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609a667c08b18---9207149060.pdfIn PDF document text
    • https://mfdesign.hu/files/file/gulukiw.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/41899481675.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608785875726e---69481112485.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfe6f1252b---947667799.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/51574166547.pdfIn PDF document text
    • http://markone-tools.com/upload/files/63858329714.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/90844404234.pdfPDF link annotation
    • http://yournamebadges.com/withyourdog/cms_uploads/file/23087150793.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076ad5def52d---37201797887.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7vl2d8s9dv97qdram5g3hm92u/60416319050.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/44147367129.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160772bfdb5919---16931988669.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/jiwuj.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/19e0edd39ba2bfcad67b875a02f7e444/revememabavuputuvokatuf.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/nabozopexunomofomewoluza.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b54f55009---72939568979.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608e63093d353---59453804670.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2027A 10728 bytes
SHA-256: 9c850b0d432c4174bcfd56fd8c5666e0fa466a1932f80cecc7a8d4147361b68b
font_01_sfnt_off00021b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002331e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2331E 17360 bytes
SHA-256: c221f3fb692d2a88f4d4fc6bb9e8e0bec02752d168740031f035d1bd7d40568b

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