Malicious PDF — malware analysis report

Static analysis result for SHA-256 959870c0800a6931…

MALICIOUS

PDF

81.3 KB Created: 2020-12-28 17:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8f88b39a0653544fa08e208afbf00fb2 SHA-1: 122eb87efe55216fc1c8ab878772051d1f287ef4 SHA-256: 959870c0800a69318cf73636ad9583790c879b7b8716202868e71055fea5d0d7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffmen.ru/aws?utm_term=mappa+metro+bucarest+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector link suggests the PDF's primary purpose is to lure the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=mappa+metro+bucarest+pdf In PDF document text
    • https://cdn.sqhk.co/kujusiru/bjhQhgo/human_fall_flat_free_online_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/jiiage7/tipajanowaroguperofogil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5fa54312a9be9.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/heiajbP/two_dots_game_search.pdfIn PDF document text
    • https://cdn.sqhk.co/fopavege/UCha8hf/46455044215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487208/normal_5fae2a1637f6a.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/ieuiip3/madujolipupipijavuziwug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5fb6cd8f064bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fc9e2c34b725.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/jgdgeLN/55717722763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f8c492f5528f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488133/normal_5fcb1b40e6982.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/WhaicAM/mining_accident_south_wales_the_crown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fd9f503360ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 5412 bytes
SHA-256: acce44bb910bf5ef7a5e84af8ea4103406a5858f2879adb37730669242ecb38e
font_01_sfnt_off000113d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D0 10740 bytes
SHA-256: 6bc58ec164d1bf019048d12d7ae213cb75ccc23c92bb24ffb951c2ea5606a6a6

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