Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bf55c2930678f4…

MALICIOUS

PDF

76.7 KB Created: 2021-02-15 03:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3e8dca76302a9e35400aa53de27b7a9 SHA-1: 7d0ad2ee1d39369ab43e5b81805e53d9165f0e8d SHA-256: 68bf55c2930678f439b9a85c839522f0d336eeffd699ddcdcc0f3d70f5e2d8be
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/123?utm_term=arkansas+sales+for+resale+certificate In PDF document text
    • https://palujaburufo.weebly.com/uploads/1/3/2/7/132740236/gudup.pdfIn PDF document text
    • https://ludekomu.weebly.com/uploads/1/3/4/5/134505051/nuviwiva-xitimobes.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/gEidEF0/62476769152.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/linokabegemenavuvojo.pdfIn PDF document text
    • http://3bki.ru/lofosaxiwadtm7dt.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/jbhdjcp/81261273180.pdfIn PDF document text
    • http://seamanygau.best/56376425996y4wtk.pdfIn PDF document text
    • https://pinababinazu.weebly.com/uploads/1/3/2/6/132695354/2f7ac2bc3357.pdfIn PDF document text
    • https://sidanarud.weebly.com/uploads/1/3/0/9/130969336/pobaberebevizop.pdfIn PDF document text
    • http://extrameets.fun/jimokukupujati7kmm3.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hTygj4I/super_monkey_ball_switch_golf.pdfIn PDF document text
    • http://nout-sale.site/mezafifezijurevonamaniz4z69t.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/0d0ba.pdfIn PDF document text
    • https://dipupobelazaw.weebly.com/uploads/1/3/1/3/131380354/lupabazogigosa.pdfIn PDF document text
    • http://itslm.fun/astronomia_nova_keplerwc2yn.pdfIn PDF document text
    • https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/dumifiz.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/tKxUHha/game_of_thrones_cast_season_3_episode_10.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/dazuxivuziwabo_siwivoleda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitizobuv/62898362187.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/bilaguri.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/dizum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 4716 bytes
SHA-256: 1f5ae9d777cd0f1663c6c8ee7e5f8b60884ef2500a01b47be69063c93bf53468
font_01_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 11096 bytes
SHA-256: 15052a297f33deab04e457fccc50134f7f37681776026684692ba49227b62002
font_02_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3