Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe80a58d0164d41d…

MALICIOUS

PDF

102.5 KB Created: 2021-03-31 04:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4327bdee0336ac2705e1c09a90c0fea9 SHA-1: 11c180f8059ed4755608ce690919066d1814fc20 SHA-256: fe80a58d0164d41d203c0e7af96b01d60a08b8e378c98a950ea284c721aeef94
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://dafemum.ru/strik?utm_term=missing+menu+meal+arby%2527s', which is highly suspicious. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'arby's', suggesting a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=missing+menu+meal+arby%2527s
    • https://cdn.sqhk.co/letareximo/jBijicM/generic_skills_and_entrepreneurship_development_book_download.pdf
    • http://mitutepoka.medianewsonline.com/ansi_code_for_relay.pdf
    • http://patufulek.22web.org/all_country_calling_code_list.pdf
    • https://cdn.sqhk.co/kizusuvut/d6GFmwp/amtrak_train_status_northeast_corridor.pdf
    • https://cdn.sqhk.co/tumosirewuw/idihthb/never_have_i_ever_cast_paxton_sister.pdf
    • https://cdn.sqhk.co/luwokiseg/ibjdTWZ/76424097073.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b2d38d5e-6f28-4fdc-8f04-452a058e7932/vufusosimurepujuwo.pdf
    • https://s3.amazonaws.com/waxegatulo/33751156982.pdf
    • http://wesofidufu.rf.gd/39925647170.pdf
    • https://uploads.strikinglycdn.com/files/a7055696-d17c-469f-a8a3-77de75473c16/weider_ultimate_body_works_incline_bench_video.pdf
    • https://s3.amazonaws.com/sagotomagin/rajokejatumugakexo.pdf
    • https://uploads.strikinglycdn.com/files/f35d146a-dcea-4f70-ba1b-82d610b11fd2/little_red_riding_hood_costume_cute.pdf
    • https://uploads.strikinglycdn.com/files/cb5bc36a-df05-48e8-8a08-672cc3642d81/football_manager_2020_cheat_tactics.pdf
    • https://uploads.strikinglycdn.com/files/e4181754-3f6d-4393-a042-010dcba3583b/samsung_galaxy_s9_used_price_in_pakistan.pdf
    • https://s3.amazonaws.com/xisefowu/everything_everything_nicola_yoon.pdf
    • https://s3.amazonaws.com/bibejovixapis/hannah_arendt_the_human_condition.pdf
    • https://s3.amazonaws.com/saziwijaxodav/2003_hyundai_sonata_starter_location.pdf
    • http://wetukanezin.atwebpages.com/bavuxexilaledenivuw.pdf
    • http://mevililuxe.epizy.com/four_distinctive_characteristics_of_services_marketing.pdf
    • https://uploads.strikinglycdn.com/files/58aa955b-00af-42d7-8102-012a09160b7a/what_causes_gyres_to_form.pdf
    • http://nabeluropezoli.rf.gd/animal_farm_student_guide.pdf
    • http://xafofeb.epizy.com/the_heiress_chinese_drama_ep_18_eng_sub.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c44.bin
18108a44698f01dc7b9656677801c78c563dc86de646dc1044f377e63a4b3daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C44 5284 bytes
font_01_sfnt_off00014e40.bin
10d94d32a51e3a495d2466958717d0be52d9b58be951985abaf2c165416eeb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E40 12100 bytes
font_02_sfnt_off00017769.bin
fad78e6d5232901b97ffc36c06edf9cad0d221517a9765c5b68eee93d1c263be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17769 16136 bytes

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