Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae6b8fa4f5f93d2…

MALICIOUS

PDF

76.4 KB Created: 2021-02-25 15:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1576ff49d1a18b72d05e76341af85cc4 SHA-1: 65dc73bf5c840c6c9fa0dfa8c2061217c9e3b7f4 SHA-256: 9ae6b8fa4f5f93d242e4fa5f9f00ab6aa9d5a2dcd75133d092b5a83941d90758
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=how+to+operate+ge+convection+oven PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415768/normal_601e4f5388737.pdfIn PDF document text
    • http://opticsystem.website/legendary_warriors_game2r21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_601cbf904a1c9.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/CjWjc4q/axe_alliance_vs_empire_op_class.pdfIn PDF document text
    • http://starconflict-game.ru/34332725489f56nb.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/hjyb9zY/53861663432.pdfIn PDF document text
    • http://znakomstva69.space/fundamentals_of_heat_and_mass_transfer_incropera_7th_edition_solutions_manualvxkev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5fe9b1bc5d037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5ffc6ab2c61fc.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/iezif0r/liverpool_fc_magazine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukavomagotixe.rf.gd/pemupafivomepimasorug.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/26167657832.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/ganumagonarunapafunoze.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/99824520290.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/3d_smoke_wallpaper.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_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 5004 bytes
SHA-256: 2f955ce8a252cedca77d316d0e2c798dc2ec4bd1cef42bcc19739390aac81d72
font_01_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 11024 bytes
SHA-256: d0f6c8e2ebfa4a0f28fa1e0926a6f3c2dafc9d582ea1ff8de1e39e98f3a8660d

Open this report in the interactive analyzer, or submit your own file for analysis.