Malicious PDF — malware analysis report

Static analysis result for SHA-256 70276c05b545b19e…

MALICIOUS

PDF

69.9 KB Created: 2020-11-25 19:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5391e511fec2f80d7e938deb51aaed57 SHA-1: 6133a7247f4ae9c03b8452be7f31300ce647e5a9 SHA-256: 70276c05b545b19ed0c30e6a74a7b8aeb928ffe433a6bc530400bdf1247c69f4
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. Although the document body is heavily obfuscated, the presence of the malicious URL is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=bosch+oil+filters In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/41481253880.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/yamaha_mg16_6fx_manuale.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/obsessive-_compulsive_personality_disorder_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67861588-6c11-4984-847d-3fcedb7f4b8b/sadiku_elementos_de_electromagnetismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b185d3-3e7a-458a-80ac-b6676ce74030/56927182807.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/hunger_games_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/58261435834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab78dab-a58e-43e6-ac36-5516175edf72/7662736953.pdfIn PDF document text
    • https://s3.amazonaws.com/kugufitel/puzavunezajojule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ba9f6-31da-4800-a87b-79c7acf0f9cf/me_and_the_key_2_level_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/44603096727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef15d3d-9dd2-4fbe-8cb0-d1a411b724c5/21105826852.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_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 4808 bytes
SHA-256: d93b8640118258e1354fe5aa2f68dbf70366d06f86957c915fb7853ead6bc896
font_01_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 10552 bytes
SHA-256: b3695566bf4500089a98bff541b2eb300f5ae5644bdbb66dc17fa2f84002fcd3