Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ef78835ddafcce…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 22:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d9cd28d5bdcb197e73c868990f0025 SHA-1: 1beb391d3e0e483a06f7ec4b522b2d9c68eb0511 SHA-256: 00ef78835ddafcce2c325bd5af1632148150c5a35f348218cb6976f1fd94c4c0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable or SEO-focused domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO spam campaign designed to redirect users to malicious content.

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://xajibur.ru/wix?keyword=financial+accounting+n4+study+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502567/normal_602e7127aa06b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_603944fa435a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_604065dc9ff21.pdfIn PDF document text
    • https://noxiwojudom.weebly.com/uploads/1/3/4/7/134723323/mapefip_lujasapaved.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_6023c6b692540.pdfIn PDF document text
    • http://turajenapadefo.22web.org/free_sports_freeview_tv_guide.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/fa91e8092d0b9c.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/android_studio_app_icon_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/hV3alyt/rawowilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_600fa56e4a857.pdfIn PDF document text
    • http://help-business-media.com/are_electric_smokers_bettergi9iv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601ffcdd0a915.pdfIn PDF document text
    • http://soinjaga.ru/gotonewupetejiteximibx4ago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_600c3504c21d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_600e542911eab.pdfIn PDF document text
    • http://jolowenifar.iblogger.org/2008_honda_civic_ex_sedan_manual.pdfIn PDF document text
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/2da737d.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/dxNDMjj/sipezaninakenutufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e405fada26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamegapag.epizy.com/vertical_aerial_photographs.pdfIn PDF document text
    • http://gaxekexo.rf.gd/reduced_adverbial_clauses_exercises.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_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 5372 bytes
SHA-256: eb89121467434e5691fa152e440dab4b20203e8b6d8b00d545d0ac67339f7bc7
font_01_sfnt_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 22664 bytes
SHA-256: 25e1b36c117f726b9906ca795c4ac566950c4f0d1a2d3471bb01a3e263c85343

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