Malicious PDF — malware analysis report

Static analysis result for SHA-256 619b464c9d0fe12b…

MALICIOUS

PDF

71.9 KB Created: 2021-05-08 01:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ffcec618f1856eef033da6cad58fe101 SHA-1: f8f330e35830f68045e9db5b9e62dd5a4e7df992 SHA-256: 619b464c9d0fe12b4f0a323c572fd62a1d20497939150559ab7e4bb949cd35b2
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://zajinet.ru/strik?utm_term=caterpillar+v50d+forklift+weight PDF link annotation
    • http://tareworig.mywebcommunity.org/abroad_assignment_epaper_today_file.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5ffbe01e78776.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/amplificateur_de_puissance_classe_a_exercices_corrigs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_604f6dc0899ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_5ff805a41897c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5fe241f3e6e42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5ffcfeb4105a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_601a1c3abde90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_60677659453c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_600c8fd3cf5a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luropi/stalker_lost_alpha_full_game.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/47125719949.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/10068865566.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_ab28999466ab428595d7e6da0b2ffd03.pdf?index=trueIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_e4d521e8a93440c7be7e71ad0259ec60.pdf?index=trueIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/logiciel_pour_fusionner_des.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/badmaash_company_songs_320kbps.pdfIn PDF document text
    • http://zedowep.atwebpages.com/crappie_fishing_lures_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/lemoduvaxawavijivosut.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/diagnostico_y_tratamiento_de_trombosis_venosa_profunda.pdfIn PDF document text
    • https://b9387e75-0942-48a6-8a47-0bd3f0224277.filesusr.com/ugd/fc485c_95667946fc76487188e19535c36abb0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazofi/software_engineering_procedure_definition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 5312 bytes
SHA-256: 022ba8709c5988a98df776ebcf64b4ef0ab501699f97165a453aa1d86b1221a5
font_01_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 10164 bytes
SHA-256: 4d463603a50f7a78a5ff7fafaa61efaed79388391098711a9d5ea49a608d9c61
font_02_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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