Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e16e667e838af…

MALICIOUS

PDF

77.4 KB Created: 2021-03-14 13:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 00f39d024299510a85775c31c9358a4b SHA-1: 6e4c09e3b312e432b4b4d59ec99a1c3b1c0c06e1 SHA-256: 002e16e667e838af9c7c02db0f243d6cc77cf38b981e03e440c88baf3952c403
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting, and includes a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=how+to+set+up+a+pioneer+receiver PDF link annotation
    • https://cdn.sqhk.co/zojoguxuban/ghjbghI/snake_candy_io_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/MjihMig/vh1_live_stream_123.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/bxidSii/xijufokuk.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/graphing_parallel_and_perpendicular_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/zoduxexawi/3ghidKN/vefuguwofulaxoxunob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_6022299b7e041.pdfIn PDF document text
    • https://cdn.sqhk.co/vivejegefonu/licA3ii/80074382237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ffa933ac4f0c.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/neumonia_unam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_2cbbf0a34d9e44f8b91ae9b56eb7555f.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_9944369923e8402c8a869849170d3961.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f85c2e-0d3c-4367-9024-fd5fc0a21103/handel_messiah_hallelujah_chorus_mp3_free_download.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_7731787b314649e4825992d92b2f20ad.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_aaa1494407c44a06b183dfd05ddda70f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a8e745-9268-4972-bf79-ec7dab20d97e/23554017407.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_95ede496420e4d44b62b62d0a5af0203.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_11d3777591e64f518a9b907a6595eaa9.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_ff4aab5bf56347e69b1b462309ff4b3b.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_54803e137e244efbab3f943b05fed60b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5008 bytes
SHA-256: a77dbdeb212ecdde6df53118753d9b493cd7ee6b0a9f70149362bb18754a3bce
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 10788 bytes
SHA-256: 3c4507c92c22d9dc1bc5343b736c373145d7ebd48d39c1b7ce974ec1a439cc30