Malicious PDF — malware analysis report

Static analysis result for SHA-256 61512300e31a09ba…

MALICIOUS

PDF

68.3 KB Created: 2020-12-27 21:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c81b89e733d75bca3c14a00f74b973e6 SHA-1: 1d1f3f0f8aa350f84bbec5147e643dd799085215 SHA-256: 61512300e31a09ba9884fd8281ea1681d0a1d4166c3b0085399dd6db2b7213c7
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a malicious redirector. The ML classifier also strongly flagged the document as malicious. The embedded URLs, particularly the one pointing to 'traffking.ru', are highly suspicious and likely serve as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=ludo+champ+game+download+apk In PDF document text
    • https://cdn.sqhk.co/wedifedaguju/dGegdZH/38102546710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472185/normal_5fdd0c2e2158b.pdfIn PDF document text
    • https://bejelubizibo.weebly.com/uploads/1/3/4/8/134870507/jurem-nedogazofuku-kowexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5f928a4e63740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5fd30ca919e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5f98cd1c4a730.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/sQVjhif/23282362000.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/149281c4-eca5-4474-a76b-0dbde1f46308/ap_biology_chapter_14_reading_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb55beb3-39e6-4a94-af7d-09558d7607b1/gehst_du_schon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ad74e8-894a-44a9-8c08-e0366840b55d/toward_a_psychology_of_being_maslow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ac4579-7f3f-4c39-aaed-c68553933d35/85614848317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79abb17-7706-4e0f-adff-6f89dce4f833/notusojabukim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b63491-a18c-4828-a522-b65283c13a5e/vavifabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3551ae21-6a29-433b-8298-7d0f57c90ea7/game_of_thrones_a_dance_with_dragons.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 5312 bytes
SHA-256: d2207c2286beebfafc23ae5b2755c0a84ed59654350ef1ffff7c0b48b4e14ce3
font_01_sfnt_off0000e013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 10788 bytes
SHA-256: 9d25a772d9be245c5c1d31b0f4319ceb0a03fdf33608c1d5117887594c35f2ac

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