Malicious PDF — malware analysis report

Static analysis result for SHA-256 329682f83be99eb4…

MALICIOUS

PDF

94.4 KB Created: 2021-08-11 18:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6b52c4bb9065eb03059fe7e2a7a671bb SHA-1: 8abbc0a0577dd987a2e61c815e2acebd061acf45 SHA-256: 329682f83be99eb463566d738bd69cf2cc286b184527324a9a146579b153ad27
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it's part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=descargar+formato+de+cedula+venezolana+para+editar PDF link annotation
    • http://tuvanluatdanang.com/upload/ck/files/63664943078.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2b263980e0---kabebupilujumenojinarop.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/6748b3a7eee93729ebf4a108fbe8230f/mutizoj.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856d5554d0f---70870589124.pdfIn PDF document text
    • http://temple.mo/userfiles/file/danegosifowe.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/cc088bvpp100n2mo0vo1fhcgtg/pitaxudod.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///pulefukoverazo.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/29395250979.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/52923831004.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/difepitataxusonaxarolajop.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/9935088293.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/58415597751.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/mamivo.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4c4abed493249d0009969fc9eb438559/lenekovakuropazaj.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/312h0526k8mkmp765815il26al/bujoxopadofudirolalaxe.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba45934cc5e---16562824373.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/marixufuzozokiraxero.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/80388032208.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/aca1b6ac8145566124c6838022c44919/sijazegebuju.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bd07ad9a4---nomatimovu.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/56584388542.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a93e361d5bbc0921e98666f5b18acd44/fokifujeke.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/6391808860.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/33659897536.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_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 17712 bytes
SHA-256: 845f200f24f877b402605c3598847b71b3dadd36caf00520f6325120e682d99b
font_01_sfnt_off0001208c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208C 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_02_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAE 11188 bytes
SHA-256: 96f7fc4ad714ebda8dbebbb9a22554386ea6bb5e716c56286b449df90d7adc3a

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