Malicious PDF — malware analysis report

Static analysis result for SHA-256 6934e21e2140aa50…

MALICIOUS

PDF

77.7 KB Created: 2021-05-16 02:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0bca8e56a7f98f0fba3832483b2d2719 SHA-1: 4616cd67fc54e9d56f17f6bb088194f1b8d05c28 SHA-256: 6934e21e2140aa507a4a9b615f0ffba5ec90ce0b63f058e1a20edd26a4d87b33
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, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to software requirements, a common lure for phishing.

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/strik?utm_term=adobe+premiere+pro+cc+2017+system+requirements+windows+7 PDF link annotation
    • http://hookup154.fun/fimezotomipeqh6b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_6056bd8324446.pdfIn PDF document text
    • http://sandwichhq.club/nezixonapulexag6vqi1.pdfIn PDF document text
    • http://idealicacolumbia.site/adobe_flash_player_for_iphonewlud2.pdfIn PDF document text
    • http://detonic-hypertonie.website/adventure_games_download_for_android_phoneia1jq.pdfIn PDF document text
    • http://wisecredit.info/dbms_stats.gather_table_stats_degree_examplezqswg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5ff6bd60b5181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_605f74f90f54c.pdfIn PDF document text
    • http://rating-bookmaker.ru/how_much_does_scouts_cost_in_nzdq6jg.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/gavobawum/zagojalolupame.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_85b4b0958edc41ab8d2e257f17017c32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/titugome/p_name_status_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7474e7dc-2275-47ef-95f5-96d178e6da5b/vintage_huckleberry_finn_book_value.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/lipton_biology_of_belief.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/star_wars_jedi_apprentice_the_rising_force.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_1a64aa05e11845098af17018b3de37fd.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_fa7d876bdc1a4f488c9acd8a6f1f4b31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/wound_care_cpt_coding_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdc2521-3aed-4a9a-aeaf-b8331188f655/papeburasilagozegate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0a5ec4-b3f4-4cb5-9a3a-e130ff968154/pududanaxilevosigatinizeg.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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 5832 bytes
SHA-256: 90d9fba7ae394c8761c57d35b6a0ee1a1ab2f5cb360f95fd919f8ae4a6b1886a
font_01_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 11056 bytes
SHA-256: 799f5ffcc2f245045fd127c62dd5d3a2fa68df0f0d9b91fa4b559b47e72176fc

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