Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f8dc8768b1d03f…

MALICIOUS

PDF

86.0 KB Created: 2021-03-10 13:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b107e32e32c736770f43fa60d921ff4c SHA-1: 58375a47026ff67e8faecdacaca15f43d9ba36da SHA-256: 61f8dc8768b1d03fdc24be74fafb608bf27eb2cab225ce0715110547ce5227be
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is presented as a link to a 'supreme court case study worksheet answers'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=supreme+court+case+study+61+worksheet+answers
    • http://ital-girl.space/17261894980oohd4.pdf
    • http://zoneeuro.pro/labepirm3g3d.pdf
    • https://cdn.sqhk.co/xasakeza/gdrCkgh/vizepigoritoge.pdf
    • https://static.s123-cdn-static.com/uploads/4450512/normal_6000f6229df47.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_60323210694d1.pdf
    • http://kigumelez.medianewsonline.com/nanuxusubasepisiferof.pdf
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5ff14f28a30b2.pdf
    • http://mavogevuz.getenjoyment.net/43473605596.pdf
    • http://lobabinuladeri.medianewsonline.com/princeton_review_mcat_physics_reddit.pdf
    • http://dizititakozazi.mywebcommunity.org/linda_goodman_sun_signs_leo.pdf
    • http://idealica-italy.site/lemikix7wj3.pdf
    • http://tibagisuminove.sportsontheweb.net/super_mario_bros_2_3ds_world_3_tower_star_coins.pdf
    • http://rumigiwataj.getenjoyment.net/38292916414.pdf
    • http://1-bog.ru/20613855853aj60d.pdf
    • https://cdn.sqhk.co/kikolibub/bfidLhc/zumur.pdf
    • https://cdn.sqhk.co/gazegarov/htINgim/pefamasopo.pdf
    • https://cdn.sqhk.co/zupololano/fngc4ie/extreme_car_simulator_2016_android_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ed7a8970-eab3-4d39-bf28-b92f1fc7b519.filesusr.com/ugd/173616_5ba6e64db4f3430bb86419621507feca.pdf?index=true
    • http://supajiwa.myartsonline.com/fingerstyle_tab_books.pdf
    • http://nojikigor.myartsonline.com/how_to_oil_vintage_sunbeam_mixmaster.pdf
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_074c70969b0e4d8f891b455c8aa1c44e.pdf?index=true
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_73d91a35683a49f698c5246ae0d1ce73.pdf?index=true
    • https://592f3795-292b-4eb7-bb82-ca7d83343d16.filesusr.com/ugd/44d997_ad5e84d5184044a7a07490b410738db4.pdf?index=true
    • 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_off00011324.bin
eeda65486e7eb72df61d74a013d114c0bd18701555995bc2eb062c19cfe0aede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 5848 bytes
font_01_sfnt_off00012701.bin
b76a954d7618f00327a2f373a64ffaaaebff49f2474b54a4ec48c7337a57ca27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 10160 bytes

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