Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a5dbed7ea9a759…

MALICIOUS

PDF

65.7 KB Created: 2020-12-27 13:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 929df36d568c5a9ad4e7ed23d0ddeeda SHA-1: 77745b1b120ec59407805226adfc5990b8f9b31f SHA-256: 87a5dbed7ea9a75951a2775f132a27476cbf8dfacdee66461aab37ebcf8004b2
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 'traffine.ru'. This URL is likely used to lure users into downloading further malware or to phish for credentials. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=golla+mallamma+piano+band+dj+song+download In PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/guserapetagujageket.pdfIn PDF document text
    • https://vuxopulifutimu.weebly.com/uploads/1/3/4/4/134450850/509c13924c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5fa807f30c633.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/zederejuwitapede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8e50f584696.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9373972.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/sakaburepagase/86546523444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166e9166-f282-404e-b447-8efdd07b2147/sokimobaxasafakaluz.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/55008677566.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/bin_man_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/xawebosusa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/netikajetuzawikaxezaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae30dabe-0a2a-4d02-9a04-ed18b74146db/awakened_vindictus_private_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5a1f9a-2289-4520-a059-c34babfee3da/hexblade_paladin_guide_5e.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_off0000c3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F6 5524 bytes
SHA-256: 32a10215f4eedceabdace1ce3b8353c2c72958725ba6ce1ab190c9f132578b2b
font_01_sfnt_off0000d6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 10520 bytes
SHA-256: 701a901c5891b072dc7e0233787a2c268d2503761c438e69ed85517fc79cda7a

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