Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83c1aa19786873b…

MALICIOUS

PDF

63.9 KB Created: 2021-01-06 21:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0bba24fee90a75dab4388194761755de SHA-1: c3d20b49fb9979d362245959aabf04eb9843945a SHA-256: f83c1aa19786873bcb1aae5804fbd8cf51193f11f0477b0e5360c42785af75bc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains text related to software downloads, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=the+sims+freeplay+mod+apk+2020 PDF link annotation
    • https://cdn.sqhk.co/gixejefi/iaxFsHf/74614103692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_5fe97296e3275.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/05gfjve/online_business_ideas_in_pakistan_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/ijqmij0/53840573766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f976cc175e4d.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/BpdjexE/giposonoduserusisitabigob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_5faafb06aba21.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/ijihifI/road_traffic_signs_explained.pdfIn PDF document text
    • https://cdn.sqhk.co/jilelemo/ghgh4nJ/robots_vs_aliens_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/sivanira/jquery_if_statement_multiple_conditions.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/bottle_flip_3d_apk_hile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b755fd35-a435-4697-aee3-2cabe0085cf0/takumigeronusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1c57ab-7423-4c14-936e-24c24d4300bf/refutev.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_off0000bc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC02 5668 bytes
SHA-256: 5ed7aa5fd1b02310aff565c3c629463c3f33fb1d45456fc05622f84f23e26ff9
font_01_sfnt_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 10464 bytes
SHA-256: 7bfc10aecde6d6383ad9f4c8f1427e9b8e5ad3d1e53a934e405609815fe8c104