Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18b35197bde328e…

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 00:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a320d2de0ff2dfa963e43bea1a031e52 SHA-1: 23cb76b43d35a51a10b8326a5de3074704cd4430 SHA-256: e18b35197bde328e8d01f749a1b26f2f0e4f0e12a204f4579d02c50fa3aaf48c
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL, https://maypoin.ru/wix?keyword=audi+q3+user+manual, is presented as an 'audi q3 user manual' in the document body, suggesting a phishing or social engineering lure. No scripts were extracted, but the PDF structure and URL suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=audi+q3+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483623/normal_603b12d115b28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fe2b92d5c79c.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/eghhh1k/bomber_crew_xbox_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d3a2b9e9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5ffa3f2532ae2.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/FsNiahi/1988_chrysler_conquest_tsi_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/9hcjc0Z/uc_browser_4g_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fe9c3d95e50f.pdfIn PDF document text
    • https://negogesi.weebly.com/uploads/1/3/0/7/130739616/bc342a.pdfIn PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/4025201.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/ggcieoC/nearby_chat_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5fcb436545ea3.pdfIn PDF document text
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/4a3bebbc0e71.pdfIn PDF document text
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/412cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_5fea3b4b4610d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_600af1bbd8462.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/3jKt8sW/neon_jumpsuits_with_sleeves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601cbbd958e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_601bd6a58e9f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a93e20f-1bd6-459c-8b2d-4d4e58a515a2/dark_super_sonic_coloring_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a16929-0b7c-4ec9-992d-6d0684021c8e/13561866038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddec4df-4e98-4b62-96d4-f33ab92812d1/fedujak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748c1b4d-0c13-4d64-a1b0-59b8d49fec81/colombians_in_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623a444f-4149-4daa-8078-25b69352a280/jesavawepopunerimopivuze.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_off0000f03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 5252 bytes
SHA-256: 8c078f3cd47a37f295659b2dbe33451c72ceffa4f88bf30b4528e9e4658d6d21
font_01_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 10136 bytes
SHA-256: 9bd9951ed401ec572d7f7096c21d8bb6e01ea3789eae72c2ecb56246dcbffe78