Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ec114ee0413a75…

MALICIOUS

PDF

69.6 KB Created: 2020-12-27 07:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8a2e22d74326bf2456483b17ad9f25b7 SHA-1: 7d2fdd7178fea27fba5bff27c76f3a2438406cbb SHA-256: f0ec114ee0413a7543407f9efd6e7830bf5a60ea5f725c6f06baebe8c0eee46a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many of which are dynamically generated and likely part of an SEO link farm to obscure malicious destinations. One of the primary external URIs points to a suspicious domain, trafftec.ru, which is likely involved in phishing or malware distribution.

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 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://trafftec.ru/strik?utm_term=arkham+horror+companion+app PDF link annotation
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/jezapiteb-ritonozer-pajijovemogeti-mebilozibosori.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/papedevevin.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/mhbhchj/nike_outlet_near_memphis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5fa0dcf636d4a.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/jazefiwoxelo_moxesolikumu_jiwevudon.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/jigg4OI/royal_farms_arena_baltimore_maryland_usa.pdfIn PDF document text
    • https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/munesepafekikasosiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5fa2a190004f5.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/luramamelolem/20831250710.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/abaddon_s_bolero_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/how_to_change_chrome_profile_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3f1a17-c058-4add-9f0b-76a8d8b23165/nasidu.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/regulation_of_hematopoiesis.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/levupo.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_off0000c74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74D 4604 bytes
SHA-256: c5e6e168573ccd0bbee768a27fbe3a22999998f429230ad6f57be1c0b210cd55
font_01_sfnt_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 10844 bytes
SHA-256: 49587f9c9f7eb38157268cd193f3956b88558fabcc8b82bba747a8bbdaef4fd1
font_02_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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