Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb07c64a5675b03…

MALICIOUS

PDF

67.5 KB Created: 2020-11-10 22:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 65149a546052f9c35f86aded5b45f452 SHA-1: 52f1296ae20a2507a31034187414f3455db0dc1b SHA-256: 0cb07c64a5675b038f37395f50c711f713081e164c25d643c08458b7cc38ad64
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan-like behavior. The presence of numerous external links suggests an attempt to direct users to potentially harmful sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?keyword=the+three+stooges+spooks+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5fa81f49a7f51.pdfIn PDF document text
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/gufowujepupujoli.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/594949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8d0ec39d779.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/45c0a2c.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/pisik/defefadet.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/kedil.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/brene_brown_dare_to_lead_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jebukiralizit.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/unblocked_games_punch_out.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/my_hero_academia_season_2_episode_38_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/bissell_deep_clean_premier_owners_manual.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_off0000cc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2E 5096 bytes
SHA-256: 7c4dfafbaa92578ed24a69c7a6f2155e28ec2dc15b0640dac9f233e4e20cf95e
font_01_sfnt_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 10628 bytes
SHA-256: 1a29c126b43ba5523d7300d08a96cc589c80fba0a6beeaefcd0780e77d2241bf

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