Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f6ce10f77db78e…

MALICIOUS

PDF

74.0 KB Created: 2020-12-28 15:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8324a764df57b624c172c320b2c4fd0c SHA-1: 77db3647c7a9c0d09f96df2c072ebe5d936f18dc SHA-256: d4f6ce10f77db78ee91ba305be3a0d58cf016fb8dacbb68d01aba23d51dafabf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://gettraff.ru/wb?keyword=zinio%20magazine%20newsstand%20v4%207.%203%20mod, is presented as a download for "Zinio magazine newsstand v4 7. 3 mod", suggesting a phishing or social engineering lure. The ML classifier also flagged this PDF with a high probability of being malicious.

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://gettraff.ru/wb?keyword=zinio%20magazine%20newsstand%20v4%207.%203%20mod In PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fc9e0fa42af7.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/97Yhhja/the_battle_cats_legend_rare_tier_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8b100c1a830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_5fad53141947c.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/RUNwBS6/legend_of_ninja_dragon_fighter_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fcc4e4dd34fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_5fdd3ee48838a.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/h4phjia/60606270985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5fc317593acc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e118d6-0f28-4e51-8197-11d1d1aa85c3/mibufewiwepoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e6ad8f-516c-4228-a951-7fd2136d7566/misa_en_ingles_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866bc2d5-812c-48ad-ae00-1ec62a0f10b2/word_craze_level_685_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d1d5d1-76ef-4c7d-bb2f-e344d1f528a4/lenasobuvujofurone.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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 5540 bytes
SHA-256: f73df308d3f1ff0e10d8677160f447873e34165841597b66dbc3608e4771494c
font_01_sfnt_off0000f3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 12152 bytes
SHA-256: 2c7b9f349120f19bee20996574ea31b5a39f1319f2e7793d02b5774f8e2691a6

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