Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69e6e833e214df5…

MALICIOUS

PDF

89.9 KB Created: 2021-10-06 05:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0afe785f916c38b7c42735f1d880fe77 SHA-1: f0b56a1cdc769662c3a3ba6bb443d3477874d10e SHA-256: c69e6e833e214df54e12290853592cc0c84e6cf2066ba639b75ed388a2f5e631
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. The heuristics indicate it is designed as a phishing lure, specifically targeting Multi-Factor Authentication (MFA) codes or using callback tactics for fake billing/refund issues. The document contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to credential harvesting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://www.almuhja.com/ckfinder/userfiles/files/49516410497.pdf In PDF document text
    • https://soudurelauziere.com/upload/editor/file/nugagowawevamorukudupat.pdfIn PDF document text
    • http://erimti.com/userfiles/file/45724300447.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7d47d6261b171a0d3e4450a65d217410/16621324005.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352994a07e8---boloponenapota.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/gokemuripile.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/roviwabotuna.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1615355d12234a---20936366190.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/xasetuwudisamoto.pdfIn PDF document text
    • http://exima.kr/userData/board/file/bopufe.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613527c0704af---tuzijiwot.pdfIn PDF document text
    • http://gabortech.com/admin/file/kafuponupafolif.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/64878586099.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/todawamobuvaripoxur.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/lamifufomabuko.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/molufisefoju.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/3218210334.pdfIn PDF document text
    • http://tataservice.it/userfiles/file/72631863486.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/34401194699.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/11014797422.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/31156953419.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/zimerex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=security+tag+left+on+pantsPDF 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_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C23 19940 bytes
SHA-256: fd4406520a0391b8845e576c3d311f9bad6563b7d9f279be0d5209d1238899f0
font_02_sfnt_off00014083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14083 10944 bytes
SHA-256: d367ac85e63b7c7a895aff0dab4efffe3d94edbeb1ea352b191ba450287ed40a

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