Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c31193e278274e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-21 08:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b3ee6edefa8dbc2f34bf3c11bdf7aa6 SHA-1: eb12f0466fde9fc9726615d71ce2fcaab5b678dc SHA-256: 35c31193e278274ed895fe7d811daef8adab662127ad1ea8043723bcffe848be
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/123?utm_term=barkentina+font+family PDF link annotation
    • http://wolotalute.iblogger.org/20839212796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ffcab4a392b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_6010a941d0541.pdfIn PDF document text
    • http://buytoday.cc/brother_p-touch_pt-d210_label_maker_user_manualgnwz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5fdfaa96b889c.pdfIn PDF document text
    • http://wopazav.22web.org/artificial_intelligence_vtu_notes.pdfIn PDF document text
    • http://nevugol.iblogger.org/75562348435.pdfIn PDF document text
    • http://walletelectrum.buzz/49137556928w3xua.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zakivijojinikij.epizy.com/98793915663.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_a5a74fd0a7b24fd695128a004507a747.pdf?index=trueIn PDF document text
    • http://waraposid.rf.gd/mini_joker_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/light_novel_reader_app_download.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_58da4d681d1143ab9c9dc672bccf936b.pdf?index=trueIn PDF document text
    • http://dakamonegip.rf.gd/lp_caput_succedaneum.pdfIn PDF document text
    • http://divupovive.epizy.com/wewuze.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_b6e57f8faa37497a8d853a09bc31c0f9.pdf?index=trueIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_2ab2a240c7544430b86fcc27962227ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/top_ugandan_music_free.pdfIn PDF document text
    • http://fazegixedibuw.rf.gd/el_arte_de_no_amargarse_la_vida_ebook.pdfIn PDF document text
    • http://pefoxaxogux.epizy.com/renigonodufazeloxu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 4948 bytes
SHA-256: 2d5d6828f6b6bcfab9f4affd8f30c3a4ff58a3c247b16f85853a703f40cc1dc3
font_01_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 11016 bytes
SHA-256: 70d91ef2d4c47566936aa7335334921cb02ba6c5aeb13a410016eac43ce17608

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