Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba6cec671820cf9…

MALICIOUS

PDF

77.6 KB Created: 2021-04-20 19:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 49a5322b9197614530d517999014cd74 SHA-1: a2aa83b643c58ececd563c380729ec8d2e0475c6 SHA-256: fba6cec671820cf93c3d6d06eb0637ceac98a154932fd806d4ab4a023ed99907
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://bologen.ru/strik?utm_term=who+is+the+god+of+the+wolf' is a primary indicator of the malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=who+is+the+god+of+the+wolf PDF link annotation
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/xulikepa-gumis-rumuvopil.pdfIn PDF document text
    • http://jurelireroxux.22web.org/47798818925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_600ed37ec81e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_606ce2069e988.pdfIn PDF document text
    • https://jowomuzixife.weebly.com/uploads/1/3/4/6/134634296/e2360e291.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/3572747.pdfIn PDF document text
    • https://naligunuded.weebly.com/uploads/1/3/4/4/134472871/2056233.pdfIn PDF document text
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/zuforiroferepo-talepisuse-zipivulirur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_ce28020416c74a5083725653512469e2.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_48e6d478cf664fc3a1299cb821d5fcc4.pdf?index=trueIn PDF document text
    • http://ferenekukosazu.epizy.com/project_plan_excel_template_xls.pdfIn PDF document text
    • http://vesijugi.epizy.com/metro_cryptic_crossword_answers_today.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_f61e94c9edad434ca77714ac39a57b0c.pdf?index=trueIn PDF document text
    • http://lekugonaj.rf.gd/yukon_bureau_of_statistics_population_report.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_bcd7db2310964aeead775667df8c3617.pdf?index=trueIn PDF document text
    • http://memapekoge.epizy.com/gate_2020_mechanical_question_paper_with_solution_gateforum.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_7db130d699484c26bdc43c0842a67d41.pdf?index=trueIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_a1b55277a8e24277a04262e63fadb2a7.pdf?index=trueIn PDF document text
    • http://topajikof.epizy.com/46347784343.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_78b27790cbc3438baf29efdbfc2a9c59.pdf?index=trueIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_5328192718db49de8932485fcefa2ca0.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_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 4968 bytes
SHA-256: 30325c21a1691588486b92bc02d182e58a0b78ba07c3d85723ca47922a230e42
font_01_sfnt_off0000ffa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 12208 bytes
SHA-256: e90211f9ebd01597f6a03c92b9cd8c86232edb34d6655e82aceaa63c3bff3449