Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41c253d3dc6f92c…

MALICIOUS

PDF

74.7 KB Created: 2020-12-28 17:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3f5b1cb21fa58bd21655a5d9753f8b1f SHA-1: edbdbec8768bfa32e46aa7eabd19be5ed5ebf124 SHA-256: c41c253d3dc6f92c481dba455e5a527181d8772b2efea504fa71d0ca55832ea6
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 'ggtraff.ru'. This URL is likely used to redirect users to a phishing page or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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://ggtraff.ru/strik?utm_term=galaxy+sky+shooting+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5f8b8d6c8b904.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/7ihyPHy/yeezy_700_mnvn_orange_on_feet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f97811f10f76.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/jagipAH/rope_frog_ninja_hero_hack_money.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/jdWhajh/gaming_wallpapers_for_pc_1080p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5fde7356257b5.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/V14D4BZ/66159466039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5fad9936453da.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/hghcSKg/palukejovepiridufuw.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/tobobowu/82411070332.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/tujixeputixuzogerepu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/biota_laut_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/89547004416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8c6649-0298-4204-b37e-fc939c2ea370/munevepogubimazopidenedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b7538e-1ee0-4f03-9da5-07edb16a07a0/western_atlantic_university_school_of_medicine.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_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5544 bytes
SHA-256: 3218d6992f4b79959ed611bea0be71d62ded3d8b102efba0c8b8efe76a3a3ea3
font_01_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 10836 bytes
SHA-256: 4263175ebb680f120a88a7878db65ffad7fa504c967dfc8e7e105699ff18370f

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