Malicious PDF — malware analysis report

Static analysis result for SHA-256 8327f0e0f93cf476…

MALICIOUS

PDF

71.0 KB Created: 2020-12-03 03:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 69ec4560c73177e75d1d6a834c7f46ba SHA-1: 3175448351dbaeb3983bc2eb32f4c774d8aa0de6 SHA-256: 8327f0e0f93cf476b862ffdfbac9e1845f65c0e25719566d213a5f7a59748122
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. It contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to redirect users to potentially malicious content. The primary malicious URL identified is https://traffnew.ru/123?utm_term=amor+eterno+violin+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=amor+eterno+violin+pdf PDF link annotation
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/4231792.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/vokuzamik.pdfIn PDF document text
    • https://mupawume.weebly.com/uploads/1/3/4/3/134365579/mimunitawi.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/a26acc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5f97c93382a1b.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/diweduromebatapalofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5faacf58e5053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fa4897ea7ec8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65014f98375720d8661c/1606378754977/she_loves_math_parent_functions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe25ba2dd96f5918b7be74/1606297018807/ponipibulesisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b737817-cc29-42da-b684-3cceba8bd810/pbds_assessment_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2a1ec917750a3d7d2c6/t/5fc10e139d79364840b29e16/1606487572023/7881221879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e70c82-37ce-4964-adf5-a0cef933ff6d/popular_piano_sheet_music.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CB 4848 bytes
SHA-256: 9335751930f7c17c4281629b732cc24f73ffd3a0228512e149ed211bac3ea20e
font_01_sfnt_off0000c83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83B 15284 bytes
SHA-256: f4fff471e640a5b9f16473ba4182e43231af67d0939cfbf23c6988030ae3266f
font_02_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd