Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cadf764815d8439…

MALICIOUS

PDF

103.8 KB Created: 2021-02-28 14:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e368b0f480738458a812c27d02ec5ccf SHA-1: 98a365dd5c6beb2eeeb73795e9067a91c0f285ce SHA-256: 5cadf764815d8439229df01ebc98ef8d88f6dc17d47d7d160430693d8d0c8d49
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9987

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=what+was+the+significance+of+the+case+of+marbury+v.+madison PDF link annotation
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/refavudoranimew.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/fZhf2RG/uber_driver_sign_up_promo.pdfIn PDF document text
    • http://dkmz2.club/dikurarofokexidapeke29fpm.pdfIn PDF document text
    • http://shoop-fh.ru/laserfiche_forms_answersrpndr.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/gjR2jbJ/yellowstone_volcano_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/pobefozo/h1LwuhL/ccdc_gold_documentation.pdfIn PDF document text
    • http://power-guard.shop/critical_analysis_essay_templatek7krw.pdfIn PDF document text
    • http://servicesforsupport.com/xubivakejotufogejifilblv4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_6007c21452415.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/jhdEE88/top_hits_of_the_90s_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/fhcibgd/86587085429.pdfIn PDF document text
    • http://grampus-shop.com/business_driven_information_systems_3rd_edition_free_download7b455.pdfIn PDF document text
    • http://appletopshop.ru/bekhayali_song_mr_jatt_kabir_singhv0sb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5fe714f51c540.pdfIn PDF document text
    • https://vedirivokezijil.weebly.com/uploads/1/3/4/1/134108565/koxizexuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5ff27a2148af1.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/dzgjcgg/wetofejufuguraninero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387819/normal_5fce5a934e016.pdfIn PDF document text
    • http://bestunew.xyz/petadoraxirixozikumegjgt4a.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/dcfe2a215af1f9d.pdfIn PDF document text
    • http://copyright-security-ig.com/baby_princess_coloring_sheetswci79.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/Whgfibs/treasure_hunter_vr_freeze_runescape.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/Hvic5vv/vitipisuden.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CE 5724 bytes
SHA-256: 74b4f8687e096fb63d466dc0fe402de06280364c4448aa8d5f6145f78bfddb78
font_01_sfnt_off00015c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C39 11508 bytes
SHA-256: e5f022de4a2f7119dd9a54167d6d13883a38a0312f983b0906a2f9d391fa7461
font_02_sfnt_off000182b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182B0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3