Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0d1c1460f57a90…

MALICIOUS

PDF

76.2 KB Created: 2021-03-02 22:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 72fc02f2fd9de2041962242cb0849424 SHA-1: 5313fe21e224eac77982c63ad01f010fc6438a3c SHA-256: 5e0d1c1460f57a90a44e93c20c9593a4f0ef565fe3b13b313e6f5f5d6d306eb3
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 0.9998

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://resalured.ru/123?utm_term=troy+bilt+super+bronco+belt+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6016ba8348413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_603022018f12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_6038c8ea3cfe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5ffdd31304794.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/jeifhd7/fefelobiwojozugigepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_600f7a2993d50.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/kixoxidopumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_603826362ea97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475861/normal_5fe12e2c9790f.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hg4hghg/jun_pro_titan_2048_interface.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/best_gary_vaynerchuk_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_600070d0cdfe5.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jgjHMhg/subway_surfer_game_online_free_download.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/dumobekegudide.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/epson_wf_2630_driver_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusebirenox.myartsonline.com/powertraveller_mini_g_manual.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/how_long_history_of_china.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 5268 bytes
SHA-256: 7d6cda6c3b5dbf7e80931561485c644a1f10c53bfcf45fc72508609a08e99e84
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 10256 bytes
SHA-256: 5bc87d0d15831b19972f255717e6ef28f0d9fc8fe32bc8a9317492ae395331e4