Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f091515113b5cf4…

MALICIOUS

PDF

77.7 KB Created: 2021-02-26 20:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: de613f9f129246e4e51a3f1e7fbcd1a3 SHA-1: 093f89dc06f9a50d847aa276cbc28a7e4b1919d8 SHA-256: 7f091515113b5cf47f530be70c65ad857f3d64c8d5626d1d5db6dacd9b220ef1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'wkhtmltopdf' in the metadata and the structure of the document suggest it was generated to obscure its malicious nature, likely serving as a dropper or redirector to further malicious content.

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://jumiwimov.ru/123?utm_term=what+is+the+role+of+audience+in+technical+writing PDF link annotation
    • http://mini-cam2.club/98063348601zgt9x.pdfIn PDF document text
    • http://zusetuwegu.22web.org/tavuw.pdfIn PDF document text
    • http://3bki.ru/nadurawolugizukef2dobe.pdfIn PDF document text
    • http://pet-guru.shop/sword_of_truth_terry_goodkindf5atk.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/31692475302.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/4215906.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/felofapopesipowilub.pdfIn PDF document text
    • http://alesyasemiletova.com/presonus_studiolive_24.4_2_ai_tutorial4rtvo.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/66896086077.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/demigezijevita.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/how_to_use_ready_mix_concrete.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/zixilanujugo.pdfIn PDF document text
    • http://sis-paypal.com/college_board_sat_9_answerst241d.pdfIn PDF document text
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/kesakizi.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/fundamentals_of_engineering_exam_study_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/dizife.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/2362224993.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/best_electric_pool_heaters_for_inground_pools_reviews.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_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 5388 bytes
SHA-256: fd1621f86e23f85de36c7b362e3bccce6f5580212d20c011edd6d1e0dca63c93
font_01_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 10688 bytes
SHA-256: c1cfb9ebdf85401c2fa301df85aef3b543447de70c165a2614d7ab73854b6ab8

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