Malicious PDF — malware analysis report

Static analysis result for SHA-256 f544091e775da671…

MALICIOUS

PDF

70.9 KB Created: 2020-12-27 05:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 19bfa464c9f2f72808b705455729f655 SHA-1: 7d629a22f00504f336732b2ec9b5a2f92b9234bd SHA-256: f544091e775da6711510b1d68a697d9a12e5cb150df834221a0880abf92c83b0
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://traffking.ru/strik'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=the+crown+queen%2527+s+racing+manager In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5fe64c2b68d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fb2c4d07bfa1.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/UrhIV6L/28979008678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fb2bbea03971.pdfIn PDF document text
    • https://cdn.sqhk.co/sukurorezib/XQgdgg4/cartoon_mobile_screen_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f8d1d6b26573.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/Lbk7hci/iihf_2020_live_scores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5fbc7690dcbfd.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/49c48daf-ed57-47a2-8739-16a8df367d77/marble_legend_download_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5428c7-d620-4211-b413-bd23cc619276/46891757854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac98bbd-2194-4f62-804c-6cf7c0615eb8/ecom_cash_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ce5a8d-e858-4c46-ba7a-c0830376fd5c/pre-_chorus_music_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39de8d12-113b-40b2-80f7-269cbed30b30/download_game_skyforce_unite_mod_apk.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_off0000d782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 5384 bytes
SHA-256: 485f5bbbea7da9368cf748564c8caf4e94ad729bbcbff15f59dad44cfd217336
font_01_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 10768 bytes
SHA-256: a591ee4d7a4dac45a50c892b52ecb202be9a224f756fbb36bebbeb776237d805

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