Malicious PDF — malware analysis report

Static analysis result for SHA-256 776d69344bd6b9fa…

MALICIOUS

PDF

99.0 KB Created: 2021-06-03 03:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5e7b7abce4e5ad0c03d5f78526ee517b SHA-1: 858fef8453d6c6690781fc8f78d15599ae2e8201 SHA-256: 776d69344bd6b9fac103f7d4095388330fb5d90a8482eb9e4ffbe4054219123e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=bmo+financial+group+annual+report+2016 PDF link annotation
    • https://funosojo.weebly.com/uploads/1/3/5/3/135336125/1602123.pdfIn PDF document text
    • https://piluzixalevuj.weebly.com/uploads/1/3/5/3/135345731/daritulepaku_tujemaruj.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/4039472.pdfIn PDF document text
    • https://gikijeza.weebly.com/uploads/1/3/4/4/134465371/6910883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/530b75ad-e444-4b17-8030-8964ad50fbbc/34497608941.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144414201/resignation_letter_format_in_marathi.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/69875352649.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/jexosoked.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/w/file/fetch/144512706/subejuvunapidikovebutuz.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/ligesawum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6da6ab-efc2-48ac-afa7-c8c7388f2d48/top_safety_rated_booster_seats_canada.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144519984/review_phim_when_marnie_was_there.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/f/possessive_adjectives_worksheets_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6485671-84c2-4622-a2ac-916ce6d6f90e/76725049975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985691f7-14b7-44be-ac07-0e27e1590505/suvelidizaz.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/how_to_reset_bose_700_remote_control.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144480960/98608994765.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144441984/quadrilateral_angle_sum_worksheet.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/lg_bootloader_unlock_tool_apk.pdfIn PDF document text
    • http://mizelabe.pbworks.com/f/how_to_chick_fil_a_rewards_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ede4391-17f7-4664-9325-645c22e65e30/72838962808.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/63385536808.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/w/file/fetch/144438798/telecharger_tubemate_2.2_5_gratuit.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141ED 5688 bytes
SHA-256: 2153db874894d679349126c18893b6b5b825cd6a96687416d18e307c6a7afae9
font_01_sfnt_off0001553e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553E 12648 bytes
SHA-256: 2e7d554cd7379077d4c90db0320c2b4993d8d92bc5a3560cdb71b479b176be74