Malicious PDF — malware analysis report

Static analysis result for SHA-256 91099d8584798c7c…

MALICIOUS

PDF

91.8 KB Created: 2021-03-25 02:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d77311d9e4bad0d2458d8a1746c7af SHA-1: 5631d986c156c629a08b694032994b8b4d8578be SHA-256: 91099d8584798c7c14eb324b6a19fdc8c2506517efd318bf1ed42877c749238a
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 'midufefew.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, suggests a lure related to software downloads, aligning with phishing tactics.

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://midufefew.ru/123?utm_term=autocad+drawing+reader+free
    • http://zdorovie-vashe-vse.xyz/why_did_the_radical_republican_reconstruction_plan_faildey69.pdf
    • http://lafefutom.iblogger.org/lorentz_and_coulomb_gauge.pdf
    • http://fakabegapufiri.22web.org/16370975608.pdf
    • http://hotsgirls.online/smash_bros_brawlo3lxz.pdf
    • http://komamoj.22web.org/xezitejejivaravos.pdf
    • http://onlajn-kassa.ru/arbitration_adrvip5w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/570795bb-0cda-4993-a891-ed2fb4fcb644/naxonanumubikar.pdf
    • https://uploads.strikinglycdn.com/files/37aa7fd5-0614-4ae7-9cc9-1dd63f63a601/97573107661.pdf
    • https://uploads.strikinglycdn.com/files/db5fded1-a30e-43e1-bbe6-79a8b99995be/hp_laserjet_p1102_ink_cartridge.pdf
    • https://uploads.strikinglycdn.com/files/bb88d78b-b645-4d64-8765-1e76099549de/asp.net_mvc_dropdownlistfor_viewbag.pdf
    • http://sudewepizetego.epizy.com/99550984226.pdf
    • https://s3.amazonaws.com/tupofelasujewas/mojane.pdf
    • https://uploads.strikinglycdn.com/files/f6edc80b-36c1-46a3-99b0-bc1821ccb672/gurps_ultra_lite.pdf
    • https://s3.amazonaws.com/dojonuta/mobile_legends_adventure_mod_apk_platinmods.pdf
    • https://uploads.strikinglycdn.com/files/5503038f-8303-4fd2-86c5-17c207134ea7/joxewekamowegibanu.pdf
    • https://uploads.strikinglycdn.com/files/de8cfea3-7014-4fa0-b2f4-1dafa7831adf/can_brushing_your_teeth_make_them_whiter.pdf
    • https://uploads.strikinglycdn.com/files/3d76087c-9b7a-4dc8-aae1-3ca429519e35/lexus_ls_460_for_sale_craigslist.pdf
    • http://pikajovigiwijes.epizy.com/digetijuwadedat.pdf
    • https://uploads.strikinglycdn.com/files/6f1ee0b3-9fd5-46cc-9e01-5c4290655db1/xusosamobufexetulurizame.pdf
    • https://uploads.strikinglycdn.com/files/52ba9fc8-189a-491f-921f-1d7d32a8a54a/the_boarded_window_summary.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/wuzob.pdf
    • https://uploads.strikinglycdn.com/files/d88a8f89-d660-4ebe-a844-ebe0cf1d470c/zajidemuvadiko.pdf
    • https://uploads.strikinglycdn.com/files/e6feabb6-f53e-4ac4-814e-6fcabcdf09eb/what_is_personal_space_in_interior_design.pdf
    • https://uploads.strikinglycdn.com/files/e00aa482-6ffc-4713-a301-60bd1090215e/how_to_toilet_train_puppies_quickly.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101aa.bin
4563341f5eeaa6f56a14c6696a7b37d1188f1fe0c464e7b4dec80ea0a0e468e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 12012 bytes
font_01_sfnt_off000128b9.bin
011cb22c8138159b67396561043b60f837548c535b68506bd0ea3d917c9e9906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 5060 bytes
font_02_sfnt_off00013a19.bin
6e97586f47fe518652e155ceaef878b8d72dec57f947f7e6b20a5a3b80cc42e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A19 10948 bytes

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