Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce6d56ca4618c2b…

MALICIOUS

PDF

77.4 KB Created: 2021-05-16 21:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c736b2b537e3d6fbddea6c58ee9471ad SHA-1: 52e150f35cdcfddf27e469c5aa386f61a659b008 SHA-256: bce6d56ca4618c2b1596a5893c3618bbc85f1eb61f6a1d3bfc00fb5761909cc3
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 0.9997

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://leonvi.ru/strik?utm_term=safety+1st+car+seat+compatible+stroller PDF link annotation
    • https://cdn.sqhk.co/kazakilen/iiggoHe/begag.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/jee_main_b._arch_sample_paper.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/bruchgleichungen_bungen.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/U7BqMi4/emergency_hq_free_rescue_strategy_game_mod.pdfIn PDF document text
    • http://mijipuva.iblogger.org/32666952056.pdfIn PDF document text
    • http://just-gopro.com/ejemplos_de_entrevista_semiestructurada_psicologia6lo8j.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/hiAihjf/lapobefon.pdfIn PDF document text
    • http://servisvds.ru/jbl_flip_3_wont_power_offmgew0.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/24892376973.pdfIn PDF document text
    • http://wisitens.online/87815873345e80q7.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/iiggDmN/island_tribe_3_walkthrough.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/60281613583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_99893bfd827b4ab4b24a99f016ba472a.pdf?index=trueIn PDF document text
    • http://sukowinom.rf.gd/vabex.pdfIn PDF document text
    • http://puwomuf.rf.gd/64526524321.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_69aa6ce4f70d433ba27ea4863f814dd8.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_3d915c8c1d564670b531a5e9b22c648d.pdf?index=trueIn PDF document text
    • http://kubalomarupageb.epizy.com/nebubizododakukutamaromuw.pdfIn PDF document text
    • http://biparux.epizy.com/2_dimensional_shapes_worksheets.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_ff9ea0db6b194b5099caf9302cb73f77.pdf?index=trueIn PDF document text
    • https://1e5c9289-19ee-4e40-ae77-03f2e727eb38.filesusr.com/ugd/e3c460_2d5a52097c2d4d3a82f933479ffe1e15.pdf?index=trueIn 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_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 5556 bytes
SHA-256: 2881f606fb48ccbaf2f35694d8e49854145a9f1f01358b0ca02508a0842652a0
font_01_sfnt_off0001057a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 10232 bytes
SHA-256: a3ff42c261fb726e871d8be887ae91cbf7bbac0c01b2ffe4ece3e2129a5682bf

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