Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d33bedb25a946e…

MALICIOUS

PDF

85.2 KB Created: 2021-03-21 08:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c10b3c1dea5b830af4cb9c29b3293abe SHA-1: 41b3629bb4461807e39c888c01718ff6f4197ba0 SHA-256: 07d33bedb25a946e32215d8084283ab7a285a2f456c87e85d17e04d9da7024b0
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 and is identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely serving as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=realm+of+zeus+and+thor+crossword+clue PDF link annotation
    • https://cdn.sqhk.co/mugodetutag/hGhj8si/5941579743.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/hgjia54/fairy_related_party_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fcb26ea771cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_6007af9c5be6d.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/d9wjbjb/thriftbooks_warehouse_dallas.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/0hcxihh/sutazufekotas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fe941d3cf4e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_602796d83959f.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/jighqje/skater_dress_black_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/ijjhbWf/29375927053.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/midOgjT/99536162187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juliwefumekabe.rf.gd/28652545790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f9225d-8b17-4c2c-aa7f-183da6fa2ab2/fegigodifoguvoforaliruvi.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/ignou_assignment_solved_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/n_t_r_all_songs_free.pdfIn PDF document text
    • http://xumerapugegivo.epizy.com/rrb_je_mechanical_old_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/geliw.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/milosikuromit.pdfIn PDF document text
    • http://ravesezubepad.epizy.com/choodiyan_official_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd75d9d-857a-485d-b255-153f65743e81/bisibinanopewitipiz.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_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 5408 bytes
SHA-256: c2a68d78b5f536ddf67c5f9bc4460b7dfde5820b1e4f218c698b8008ed4d0939
font_01_sfnt_off000114ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114ED 16696 bytes
SHA-256: 4b7aafd5ae08c06b7aaf66b260e9ea44b7912f9a96c56e615d01bf642f2a7749

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