Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6439359f2cc177…

MALICIOUS

PDF

69.0 KB Created: 2021-01-26 20:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9c1f22bd14f48be965b0eab36fce9370 SHA-1: e428a4e0533fa0f814676f89e0bb3d22243292c4 SHA-256: 7d6439359f2cc17745b07ddcfe7c34b65d51aa74921d99803a4c7f9c9fff4e24
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI and the overall detection score strongly suggest a phishing or credential harvesting attempt.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/123?utm_term=lacie+orange+hard+drive PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fe1c937883df.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/Z6iiHhh/best_ninja_air_fryer.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/jihdzgf/japanese_woodworking_classes_nyc.pdfIn PDF document text
    • http://trokot-shopnew.online/20955308528yozjd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fc7789896fdd.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/aH3heib/blazetv_promo_code_free_speech.pdfIn PDF document text
    • http://merishwheelrecords.com/praise_and_worship_songs_list_and_lyricsbnjzm.pdfIn PDF document text
    • http://insurancesouk.com/attendance_tracker_app_for_studentscehm0.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/48SohbZ/pofasodasit.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/jitShXu/vumipidabatuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_60096ebe75b23.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_off0000ba33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA33 4992 bytes
SHA-256: 563e84b79f52aaa34568bcd983253e2ae68bff8abd189e3949c4ed0debb4efbc
font_01_sfnt_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 11048 bytes
SHA-256: 8eb89c51f904aa2e8bb7442ab8eb16ffbd0f6a763fde85ae9c5ab7ccdcd8e971
font_02_sfnt_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3