Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf6aa726d623bef…

MALICIOUS

PDF

96.2 KB Created: 2021-02-27 15:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 788d09e4b94a14b247a6b043723a7984 SHA-1: 94d380665a08e78eeec1b6428c7dc41811d70006 SHA-256: ddf6aa726d623bef2585a8ec7e38c59eb42b3568e9a662246179e93e460323bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

Heuristics 5

  • 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.
  • 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://ponafet.ru/strik?utm_term=what+is+the+purpose+of+a+land+grant+brainly PDF link annotation
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/70164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370057/normal_60059595d6ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455907/normal_6010012fac854.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/vivah_video_apps_karna_hai.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/mikivivakatusej_kukos_tetenazifoxip.pdfIn PDF document text
    • http://zuwigef.22web.org/25476280202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496001/normal_60067219d31fa.pdfIn PDF document text
    • https://mototide.weebly.com/uploads/1/3/2/7/132710683/duxasabowarof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469353/normal_60064d46e701a.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/introduction_to_accounting_textbook_canada.pdfIn PDF document text
    • http://rodupokikoxozed.22web.org/68068687590.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/new_navy_jet_trainer.pdfIn PDF document text
    • https://vavaxurose.weebly.com/uploads/1/3/0/7/130775274/reveni.pdfIn PDF document text
    • http://jabisoj.22web.org/90503029671.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/luzasedum.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/4dc83acfae1a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubexejevobogi.rf.gd/demufulebo.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/indirect_object_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/hepatic_arteriovenous_malformation_radiopaedia.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_off000134f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F5 5556 bytes
SHA-256: a9bbb2cd4ec859a3d22388b8431818d881c0ab6bcf64346378502bff1b12136d
font_01_sfnt_off000147e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E3 13044 bytes
SHA-256: d7319085c7da4b75e441f36c261353165eb356d84df0cddbc1019305a02fcaf6