Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bbe7a4c2041a41…

MALICIOUS

PDF

73.8 KB Created: 2021-03-14 18:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 01891d394922db73a360049d7c4e0332 SHA-1: 7472c268ec896e82d9ebe4d35461ce3eabb29171 SHA-256: f7bbe7a4c2041a4110a6fc3239277f935f9c5350201cf28a28959fd39650f4c5
134 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=notary+public+record+book+template+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406216/normal_5fd8189b3cb93.pdfIn PDF document text
    • http://smcjd.com/hayward_de_filter_multiport_valve1ojka.pdfIn PDF document text
    • http://lifegirls.site/biointeractive_photosynthesis_student_worksheet_answershl3vv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5fcdf86e23a90.pdfIn PDF document text
    • https://xurozakewera.weebly.com/uploads/1/3/1/4/131414240/0f3ff41d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367646/normal_5ffbb0e214a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fd89e9f7819a.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/4044648.pdfIn PDF document text
    • https://mewejubakokexal.weebly.com/uploads/1/3/2/6/132681976/4296404.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/GgjMVih/dynasty_legends_true_hero_rises_from_chaos.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/g70ZL6I/japanese_anti_aircraft_cruiser.pdfIn PDF document text
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/pofujolelewona_gepinekato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5fed38d144915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_602834af0dfff.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/byJQjas/rowipozuzegirexivosarujid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60145f8f460a3.pdfIn PDF document text
    • http://fuckfrsky.com/acrylic_nails_with_rhinestones_designskeprz.pdfIn PDF document text
    • http://autokenn.com/fulotagelonofipazopugwmd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fe143ae8672c.pdfIn PDF document text
    • https://tatujudipopef.weebly.com/uploads/1/3/4/6/134605081/f6b8bc1e7d67.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/kegokup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 5396 bytes
SHA-256: e896ec73bdd1f2a25e26a65bfd3287168643bfd2d7b57c163f5654ca1b253078
font_01_sfnt_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 11328 bytes
SHA-256: 2d7f09f183270ddc78dde3fe1dae8a43a0f4a674b71311120b7278d9afeea847