Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf4bd42902a37a6…

MALICIOUS

PDF

78.8 KB Created: 2021-04-12 07:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: aa543f5617735dc1f26ab3881abbcb86 SHA-1: e504f48e769ddaf9b1207071bda73136fb0a4694 SHA-256: caf4bd42902a37a6e9363166bf78d735d73efaf6a07c1f90f48bfb5de3a53afd
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites under the guise of search results. The primary URL, 'https://bologen.ru/strik?utm_term=should+i+read+the+bible+in+chronological+order', suggests a phishing or scam attempt by leveraging a seemingly innocuous search query. The presence of a large number of external links, many hosted on disposable domains, indicates a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://bologen.ru/strik?utm_term=should+i+read+the+bible+in+chronological+order PDF link annotation
    • https://sejerujezoxovod.weebly.com/uploads/1/3/1/3/131398555/874236.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/RpPljhZ/cut_it_out_meaning.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/pojidewem_xekojumivi.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/j3Zhh3I/magic_bullet_premiere_pro_cs6.pdfIn PDF document text
    • http://titanovyi-filtr.ru/bodowonor370p.pdfIn PDF document text
    • https://lewugudufe.weebly.com/uploads/1/3/4/6/134668986/717c9ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/fepebage/jfhj8ha/mapeloxililoz.pdfIn PDF document text
    • https://cdn.sqhk.co/mapibeze/ibigiaE/cheapest_flights_city_airport_to_glasgow.pdfIn PDF document text
    • http://wdd13.ru/tonasutufowupovuni2a86.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/hZvigrM/wamugesixutapifazobese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/hernia_inguinalis_inkarserata.pdfIn PDF document text
    • http://lixutepojux.rf.gd/spotify_win32_application.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/vipulotimojob.pdfIn PDF document text
    • https://d2497fa9-5496-4194-9764-f4b168485e88.filesusr.com/ugd/eed259_fbb94e071964468ba012a4ad59d00eb3.pdf?index=trueIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_19567710f28b44df9361fa00dac34c2c.pdf?index=trueIn PDF document text
    • http://xodojes.epizy.com/kadoxanosawewopexowo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/the_bible_is_the_inspired_word_of_god_kjv.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_0f0f8412fd774bf5879680da3e422bf6.pdf?index=trueIn PDF document text
    • http://dopepekaloza.rf.gd/software_to_split_and_merge_files.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_b0536e9f501c445f915cd4cd6d0a02e3.pdf?index=trueIn PDF document text
    • http://janobufove.rf.gd/ponerodakofadepodira.pdfIn PDF document text
    • http://mesilixogu.rf.gd/60370978907.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/56363193070.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_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 5268 bytes
SHA-256: 214fc2a028a9159d965bccd560233dd421813f4579e4625ff8b0257eaffa9f20
font_01_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 11080 bytes
SHA-256: 0f44e8aed1a5726f6a6525e1ecafb941b8e9c6d457e9e79eeb8cb673655d289e