Malicious PDF — malware analysis report

Static analysis result for SHA-256 d868cd869e1c6c80…

MALICIOUS

PDF

73.8 KB Created: 2021-02-25 03:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ba025d04f9f2ba5891d8bb09a2dbdba SHA-1: 11eeed05ed944f6921ceff53982695301a26b54a SHA-256: d868cd869e1c6c803959220a198fe8db0bdfc29974b96f086467ddd97a470b21
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://druttle.ru/strik?utm_term=massey+ferguson+1655+review PDF link annotation
    • https://cdn.sqhk.co/tiwefuxab/Chidnnb/91504134323.pdfIn PDF document text
    • http://falifipes.iblogger.org/star_wars_clarinet_sheet_music.pdfIn PDF document text
    • https://vizekufebatovut.weebly.com/uploads/1/3/1/3/131382320/7463238.pdfIn PDF document text
    • https://lesavamu.weebly.com/uploads/1/3/5/3/135347369/3335526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_602d64e880025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_600feaa2d8f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd611ede2ade.pdfIn PDF document text
    • http://nisiwitas.22web.org/78293145134.pdfIn PDF document text
    • http://lulumel.66ghz.com/bitsat_2017_question_paper.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/a4238.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/gidMTig/best_werewolf_romance_books_on_wattpad.pdfIn PDF document text
    • https://muxojuwarerufi.weebly.com/uploads/1/3/5/3/135388895/fixuvufa-wojijabiw-nogimixasorat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_600b27e2a8dae.pdfIn PDF document text
    • http://visodesux.iblogger.org/55129516272.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
    • http://fukesok.rf.gd/11917332641.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/daily_lesson_plan_template_elementary.pdfIn PDF document text
    • http://komupidije.epizy.com/descargar_frankie_ruiz_tu_eres.pdfIn PDF document text
    • http://gagafexekoxoseb.epizy.com/nonim.pdfIn PDF document text
    • http://nipuxedexup.epizy.com/38015797538.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 5292 bytes
SHA-256: 538b49931a8a94040c954fbcf59d76286c463a2eaf1bb1da76ef508377e31496
font_01_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 11140 bytes
SHA-256: bf53aadcc090467125c18658330c0a83eedfb6655d7ea16d5ea7c9b0a8212fcc
font_02_sfnt_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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