Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6ffbc501bee57e…

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 06:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53d436a58e7d088a023dbfbe0948de0 SHA-1: f164eb03776bcd955c1dedc2ce593ea524bc065d SHA-256: af6ffbc501bee57eddba226429773d30ab52fa5dfd7e8a2fea82b94369a42bb9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a medical topic, likely to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=anemia+hemolitica+en+el+embarazo+pdf
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/luwedavagupeki.pdf
    • https://cdn.sqhk.co/tawavumazo/sziaigk/ninja_arashi_game_video.pdf
    • http://vatidenow.medianewsonline.com/dare_to_be_kind_book.pdf
    • http://recepty-dd.info/sigagigosanunavopik9hmh.pdf
    • https://cdn.sqhk.co/zopimoforaja/jhPgiDU/skip_bo_rules.pdf
    • https://nuxozabu.weebly.com/uploads/1/3/1/8/131871912/womavuwetirutatudo.pdf
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/neberol.pdf
    • http://cocobuka3.xyz/fish_plural_possessive_formhs1hm.pdf
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/wazabuwosi.pdf
    • http://lnstagram-blue-ticks.com/6126931323592kdx.pdf
    • http://reduslimitalia-official.site/how_to_hold_snare_drum_sticksdw0xs.pdf
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/zukuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d0d8f471-90d4-4738-b0b5-27477c24e067/microsoft_wireless_mouse_5000_pairing_mode.pdf
    • https://uploads.strikinglycdn.com/files/727d9aeb-7d20-43df-ae92-590882ceff33/the_most_listened_songs_on_youtube.pdf
    • http://pasifowon.atwebpages.com/gewosimiwupebabedewexa.pdf
    • https://uploads.strikinglycdn.com/files/77935e44-0e78-4641-a3d4-aadcf012e865/administering_medication_via_g_tube.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ae.bin
5012ce79fcb6f008c6b28e5816a2066fd2c74d340423cfb8f9a764d4ed87b406
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 5396 bytes
font_01_sfnt_off000103e2.bin
10e4fc15148d5bd37b11722a19fda4bd975d93e2f490310552c743d8ada2eeb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 11740 bytes