Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf2bdbfc4692a17…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 21:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: accc9f795885816567dcbdc6ca000deb SHA-1: 29633ff4d8f75be365dafb422fa6689a6d1666f2 SHA-256: 8bf2bdbfc4692a17bb1807b5b0605d42080a6265ea190210ef48b4c33c28adf9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host many links on potentially malicious or low-reputation sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=giant+monster+vs+small+person+meme PDF link annotation
    • http://bettyloustintruckbbq.com/fallout_4_miami_mod_download_pcegm1i.pdfIn PDF document text
    • http://lidlid.xyz/74014914786f7u2n.pdfIn PDF document text
    • https://foderojev.weebly.com/uploads/1/3/4/0/134041652/fefekezoraxujud_xopawe.pdfIn PDF document text
    • http://circulyarkadigital.xyz/color_psychology_neon_green5w4f5.pdfIn PDF document text
    • http://detonic-ordina.website/ridizozagigv9jor.pdfIn PDF document text
    • http://nicechange.space/21629618156m20vg.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/4386a.pdfIn PDF document text
    • http://com-copyrighit.com/xifinebuxafoxojomilivvqlj.pdfIn PDF document text
    • http://munupesifak.22web.org/nidet.pdfIn PDF document text
    • http://wurijudopala.22web.org/sibuzeliviput.pdfIn PDF document text
    • http://mebets.xyz/783261547503lpp.pdfIn PDF document text
    • http://classkaod.ru/colt_ar_15_instruction_manualseeat.pdfIn PDF document text
    • http://stalekost.site/samsung_un40eh5300f_manualzm68o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekubegem.epizy.com/monthly_calendar_2020_free.pdfIn PDF document text
    • http://xatulebebulife.rf.gd/fokidafekinupebuwozed.pdfIn PDF document text
    • http://kefedexopekose.rf.gd/bharathiyar_songs_in_tamil_lyrics.pdfIn PDF document text
    • http://wilunimexa.epizy.com/uae_vat_calculator_free.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5056 bytes
SHA-256: abc15f34c93cc8972d7aa3d08e59b4fc16d50661c1d039ecb65088e6cf810c22
font_01_sfnt_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 10016 bytes
SHA-256: 762f1f77606a123c84babf457d300d6f413dd10cc337a543011d83b75dcdb549

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