Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54df5d07b18f2de…

MALICIOUS

PDF

67.1 KB Created: 2020-11-10 04:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c0b106a4d38227ddb48f6fe1551a91d6 SHA-1: 160363dd32b6d3f90054e329476fb7990c723370 SHA-256: d54df5d07b18f2dee6cf3c6275e5e881f0d1d41b0b3c11eb4214a4dff26e2364
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent URL pointing to 'trafficel.ru'. This suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malicious redirection attempt.

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://trafficel.ru/123?keyword=dance+moms+season+7+episode+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8b7b55bf393.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/tuditegit-timafu-detilu-waguzudoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f89b2e790a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_5fa9c0cb74fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5f93849da65dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f92174b12ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_5f977d8b705e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_5fa17b89ededc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/convert_to_word_doc_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/anti_ragging_form_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/7582750760.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/whirlpool_ultimate_care_2_dryer_not_heating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff475b7d-3140-4a39-b0c7-ad732ac446c0/miwasigokupuv.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_off0000c9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9ED 5168 bytes
SHA-256: 13a265c73fc00f78c6937f93a061222cf2fd1bb4d50544a0948068a28efe13ed
font_01_sfnt_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 10624 bytes
SHA-256: 74653fe7b1bc40d025abb95754f6717670a7a3ceb33c93d8905915eaaeb35bbd

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