Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc543ffa47505b41…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 01:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 41e584eacb4aabd9237e69bcbd35419e SHA-1: 62656709910e1aba746f9823fb428416018cf258 SHA-256: bc543ffa47505b41d98e406741fc90688ba3e540ed96f296038b26a0d5fce194
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 0.9996

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://zajinet.ru/wix?keyword=destiny+2+handling+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fd12dfe65574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_603429804f341.pdfIn PDF document text
    • http://uanews.website/tonivubaboguxek66b3.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/ijgiwE4/tank_war_machine_album.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/VijS6NC/build_a_bear_locations_in_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5ff1e6e5bc26a.pdfIn PDF document text
    • https://cdn.sqhk.co/loxufore/cigidNJ/android_custom_adapter_listview_onclick.pdfIn PDF document text
    • http://ttttrrrr.space/thunder_stock_cars_26gmyz.pdfIn PDF document text
    • https://cdn.sqhk.co/wegifopi/fdvFGKu/kagenimepapusoz.pdfIn PDF document text
    • http://omerkatanalp.com/dmt_drogue_fabricationptvrs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5fff5f8bdf08b.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
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_c1a16d418c804e109581905f9751425a.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_2db521dd577642d7b56c5c7cb740e060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/nomenclatura_para_alcanos.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/51824794382.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_37458bb496d64ef78d7e0fb3bba5c971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/pujaxedotozilepud.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_600f4790995f4a9cbfcffc12e5123c29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/consumer_reports_best_child_car_seats.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 5164 bytes
SHA-256: 0b511fd312fbecd7cedebdec383e50907fe1617db89fcb4747a37827cba0a1ac
font_02_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10868 bytes
SHA-256: 070749151bdb0b7cf055759ed548ac25a0d7bcaf7ed0041793d4f1021c55e727
font_03_sfnt_off0001290c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.