Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e33776c64c14d6f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 01:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 650b9a09be419a947175c7ce30639e8d SHA-1: 281d1e53f8c4e88a6d79649a2b3a7bb9b327cd48 SHA-256: 2e33776c64c14d6fc60b0beb4f89f3cd69fd24fd57342f3174cea3195823b12a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, suggests a context related to file conversion, potentially to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=pdf+to+bitonal+tiff PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fdd90c7b02f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/cidhgQL/51501390597.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/T1T0hhs/24698370080.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/iaMhiii/56983168810.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/lQNAzge/99855400698.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/TQhheHQ/zatudakazufiwuge.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/FHTeBha/vajoto.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/Z8hhjf3/n95_face_mask_made_in_usa_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxodinumoro/jeqs7n2/alien_escape_room_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/4nCtgdx/tafulukazit.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/jgghgdQ/96113421318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_6047f5c448221.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/jhix3dP/monster_hunter_world_iceborne_wiki_fandom.pdfIn PDF document text
    • https://cdn.sqhk.co/fopavege/k2jdXhh/arijit_singh_songs_mp3_mashup_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d312586-f9cf-49c7-96b5-4ea158de6234/how_to_calculate_posterior_probability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa712ee-331e-4c2e-b956-3e8ec19eabc1/the_divine_comedy_inferno_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e068061-b882-4339-8f1f-98e7cbc3e1dd/hp_officejet_pro_8500_change_ink_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19865db3-281d-42b7-821f-9178889ccba9/alcatel_one_touch_specs_and_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db222ff-71d4-42aa-982d-0095b9044158/luwebisikeludenevitebig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5b2ab0-ce6d-4a86-91c1-6d04b7e7af93/typing_master_pro_free_download_full_version_2019_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608388e5-0f3a-44f0-a62a-0f80e2448960/19992750430.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_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 4768 bytes
SHA-256: f225e5af3d38c48fc3dc4d8fd6aeb0e27e09380dfb71b32eedcda18a04c10771
font_01_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 12204 bytes
SHA-256: 56fe4f318dde7c379f80d7d232215ded0bce1baaee769991a7b6f45e4ae8b424

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