Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02d0c7461b15e91…

MALICIOUS

PDF

75.2 KB Created: 2021-01-16 14:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0ece80e0f49864633fd7417411c857a7 SHA-1: ed1b1d11e8eb13c5bec469473975d390e6fef2b5 SHA-256: b02d0c7461b15e9102feb18f6703f2c7c96261933714bdeb46e908482374de30
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs point to known malicious infrastructure and a large number of external PDF links, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and heuristics strongly indicate malicious intent to redirect users to harmful sites.

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://cctraff.ru/123?utm_term=r%25C3%25ADos+de+agua+viva+significado In PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/mosux.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ljggHij/table_tennis_serve_rules_youtube.pdfIn PDF document text
    • https://rarasuxa.weebly.com/uploads/1/3/1/3/131398432/bubevumiguxoso-ratago-majurapuz.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/ed0584ce3b.pdfIn PDF document text
    • https://site-1177693.mozfiles.com/files/1177693/zombie_invasion_game.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/niporofez/5282542625.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/27986494492.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/fur_elise_beethoven_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/christmas_music_trivia_quiz_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/1186232512.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/rental_agreement_letter.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_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 5184 bytes
SHA-256: d33ec2e988e071a15a5922118f1d83b876a21f1a0615560dadd533d9f3870e58
font_01_sfnt_off0000f8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D5 11424 bytes
SHA-256: a539826eb1ea6de8a79d9c357fea2256023f21150681c8e2ab5c1387e78ba86c

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