Malicious PDF — malware analysis report

Static analysis result for SHA-256 a712e9e6919bce7d…

MALICIOUS

PDF

71.0 KB Created: 2020-12-30 01:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0f0574768b00dcc5569bc00d94a402e9 SHA-1: 00cd7e981b9efe7c8ce2b9e4616989ff101c5103 SHA-256: a712e9e6919bce7da89c61ff062e743c8639de9515b619f50e6140f29292e581
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains a link to a known malicious redirector, https://traffmen.ru/strik?utm_term=digicel+top+up+haiti, which is likely used to deliver a phishing page or a second-stage payload. The presence of embedded URLs and the ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://traffmen.ru/strik?utm_term=digicel+top+up+haiti In PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/6c1af6c8a68265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f997f5f39673.pdfIn PDF document text
    • https://wigemixez.weebly.com/uploads/1/3/4/2/134265991/973f37ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5f9f348f11009.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/4749935.pdfIn PDF document text
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/00b6ae42e.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/UfQiaAy/pennsylvania_state_game_commission_phone_number.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/2990130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5fc5561d72d32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBB 4920 bytes
SHA-256: 40b51b3bef4294d68e3a60c84cfc39d2b7d18a210129962c252abfea7018dfcf
font_01_sfnt_off0000d085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 11972 bytes
SHA-256: aa90df45f1a3cd86e76e94328c481c330430e93c21cea943b64f10f3e21e772c
font_02_sfnt_off0000f898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF898 16336 bytes
SHA-256: cb8b0c3b75634a3ac40028f3142d2b99dbff9c8bfe93654f62892c2eba89f065