Malicious PDF — malware analysis report

Static analysis result for SHA-256 9383586490f07051…

MALICIOUS

PDF

82.1 KB Created: 2021-08-26 07:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 246f23d6877e164cfd27aee2affed8ef SHA-1: 63659378f03f5f6f75a0c1d725d183b12954a001 SHA-256: 9383586490f0705128cf9beded8ebc0bea47746cb483f746a1cfe7cf92bb90d7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or phishing lure. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The presence of external URIs and compromised CMS upload links points towards an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://tcsm62.org/uploads/news/file/fuzinebis.pdf In PDF document text
    • http://deltools.com/userfiles/file/gilapuvosolomaredidetav.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/14d4c9d54bacdff0ac629bb68b91cb5a/fujeso.pdfIn PDF document text
    • https://corghialberti.it/file/gudevigapajezegojulavifol.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/50f562fc2d3ac0d453ccf834a6abe46e/97502213549.pdfIn PDF document text
    • http://metapolar.hu/tmp/60433637655.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/96805039641.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/58643912386.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6a3066935---wiwadajezoninanozozu.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbde054ff2---matugovegosarozefi.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608448fe8ca4f---jujujudesarusowelolodoz.pdfPDF link annotation
    • https://actorconseil.com/files/file/14386612892.pdfIn PDF document text
    • https://cape-electronics.com/media/file/92462642916.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/100649f2d5fa2cc09a2b3efc0757964e/57511928439.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/7092099482.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/kpcq240e1hfi9n8pnukbv231b5/76151773594.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/68338657829.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/4as45oifdbcvrc4knh2osiuel8/39507850680.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/q2ksie20j3vh882g25kvs7mqa1/nunukarusik.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/8154383914.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d8e5c6dc---botusukijebimekomusinoj.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160942004bd3e5---xopisimerafadifadit.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/kotove.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/wavetexivepuvavo.pdfIn PDF document text
    • https://eslms.com/userfiles/file/mirodoluxadapek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=kidney+beans+nutrition+factsPDF link annotation
    • 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_off0000dfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BE 16160 bytes
SHA-256: 1351d3f3b8f1e347658c813288263d0959727abc732790c476a322af0f3cda89
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 10768 bytes
SHA-256: 3d7d7dfcfb48001314a8d988a1df40c19699ac8c8f3359483f8750408754459c