Malicious PDF — malware analysis report

Static analysis result for SHA-256 96569f5de71bd5f1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 01:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70aa8fcf795891ab49dcc3ae1d217096 SHA-1: 2dabbeae8752c33e027fe1beb9bdfb93c3b81df5 SHA-256: 96569f5de71bd5f1db2f56ed5fc3d003425f44d03f30e1e8369874ec194c48d2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'zajinet.ru', which is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious resource, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://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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