Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0688e9d8c39b0c…

MALICIOUS

PDF

66.6 KB Created: 2020-12-14 06:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 01cfe6bd3ffe956ea950442c932a361e SHA-1: 77dfb8908534625ffb51dfb437432e66d9adb986 SHA-256: 7b0688e9d8c39b0cd23328b18984a5d07c782d14e0be55bb412787e6a15e57f3
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://traffmen.ru/strik?utm_term=hamilton+intra+matic+38'. This URL is identified as known malicious infrastructure. The ML classifier also flagged this PDF with a high probability of being malicious. The document body appears to be malformed or encrypted, but the presence of a malicious URL is sufficient to classify it as a phishing or malware distribution attempt.

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/strik?utm_term=hamilton+intra+matic+38 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5fab5fe65eb7f.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/xalexojaxipud/22329105087.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/banking_terms_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35fb7fec-d306-40be-beb1-a9c9c45a9db3/cpm_pre_calc_chapter_5_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9143e83e-38f0-4f83-8602-9e31c7895fa1/94040393672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e839aac8-bc14-4608-8dd0-557cee508323/706059193.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/kingdom_hearts_birth_by_sleep_ability_melding_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edc6760-1be2-485b-bf7d-7aab682b2c6a/37158165228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f8faaa-7bbf-4197-90bb-57e99cba0dae/ponesilarubibedoda.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/tumavuzoxoribugofiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8953f912-e877-4cd4-b754-b47716f1c26f/vodegudasawuzoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45077efe-1842-4c36-8ac4-726fbbc2a78d/intermatic_et70115c_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/13474913222.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/building_wealth_one_house_at_a_time_making_it_big_on_little_deals.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_off0000ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 5084 bytes
SHA-256: cd23d92a209ae8df914b5573d1c69aeae27a2dc5a59ab257664ec4a33caa6c2d
font_01_sfnt_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 10104 bytes
SHA-256: 184dbf454102d303f34a9239e2f4906243828e1598dbd26588022c3715cff954

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