Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7e2752a2c8b9ca…

MALICIOUS

PDF

157.1 KB Created: 2020-12-05 21:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 50058e893e8e7c0456604366e748a06e SHA-1: d5566d47a0b14697325dd691fc9e7a2f36fced2d SHA-256: fb7e2752a2c8b9ca5389581a90825c21db34a5c4c41d7761fd36e464b21899da
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=maus+i+pdf'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector link suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=maus+i+pdf In PDF document text
    • https://nipogoloduvi.weebly.com/uploads/1/3/4/3/134368022/0d0f60a7035612a.pdfIn PDF document text
    • https://sugevemaketajes.weebly.com/uploads/1/3/4/8/134873201/4721380.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/nofawugezitedit.pdfIn PDF document text
    • https://jimamejovegevag.weebly.com/uploads/1/3/4/5/134593921/83b26f146f1.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/jididufod.pdfIn PDF document text
    • https://nolugebufumo.weebly.com/uploads/1/3/4/5/134597996/zosonunuxidedejen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9519e2a73c0.pdfIn PDF document text
    • https://jokineviraxara.weebly.com/uploads/1/3/4/2/134265776/4205350.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/mulerux/gail_india_ltd_annual_report_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/zugeketosulidakizajudo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc598a0085bf90c0e1d1088/t/5fc5f11f9ee0f32b8720982b/1606807839567/47360779837.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/84402881231.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/free_wedding_photography_contract_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/zesigijedigimokidumakewon.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/41112144638.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000220ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x220EA 31152 bytes
SHA-256: 61ed16bae766f4ed50e643f39f67529e55fd1755db1bc661b59443be3cbe28f3
font_00_sfnt_off0001e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E69E 4380 bytes
SHA-256: 03edbc3efecd69b4f24f3638ee8277449c1e594e1b94cc4273d62d2dbb53c84e
font_01_sfnt_off0001f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F57D 13928 bytes
SHA-256: 5d5a7d9a7ae18b187b84de501392762bb329a648eb38e7a67c9e20b1f578bc31
font_03_sfnt_off0002586d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2586D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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