Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6cbd5ed93aee8d…

MALICIOUS

PDF

79.7 KB Created: 2021-05-02 18:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3adac0d81ca3709be9a44b7c9e7f1346 SHA-1: 6e6edcabe9d4ef6f2f9ff34771925f3e05af3b6c SHA-256: bf6cbd5ed93aee8d2f182737554472f7f8e5b7cee08b85d467694089caca3f32
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to graphing, directing the user to a suspicious URL. The presence of embedded URLs and the overall detection score strongly suggest this PDF is designed to phish or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/strik?utm_term=how+to+graph+a+velocity+time+graph
    • http://help-feedback-amzn3.xyz/kudasogilitugupogufofuduyi4s3.pdf
    • http://phulop.store/keurig_2.0_wont_brew_carafe665fu.pdf
    • https://cdn.sqhk.co/zifeduwa/hYgddje/bixunomuvizizosorer.pdf
    • https://cdn.sqhk.co/niwuruba/hi6hgic/79234707749.pdf
    • http://itsnat.space/175169111113xmww.pdf
    • http://organize.shop/motetdpo89.pdf
    • http://gk-kuban.ru/swimmers_body_transformationiy1v2.pdf
    • http://excschool.ru/the_choice_is_yours_stick_figurepajzf.pdf
    • https://cdn.sqhk.co/mixaluwekitu/ghhfVOZ/download_ice_age_village_hack_mod.pdf
    • http://woodlesenka.ru/survival_horror_movies_2020pa8z3.pdf
    • https://cdn.sqhk.co/jazumagefo/ifNicgd/pop_music_mix_2019_clean.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://rerodijunenema.epizy.com/48112344085.pdf
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_127f3e0e7fda466e9d0c6383dfb03d82.pdf?index=true
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_959461183de3408bba3a35507f70ae41.pdf?index=true
    • http://jalameki.epizy.com/tatajotikifigakilero.pdf
    • http://jatowikuv.rf.gd/coffee_roasting_book.pdf
    • http://xaxodizanuro.epizy.com/kezodakere.pdf
    • https://uploads.strikinglycdn.com/files/61ffb0ff-8446-48d5-a839-e53647dfabc5/ragekavodiwibigoful.pdf
    • https://uploads.strikinglycdn.com/files/2357df62-9d35-426d-a51a-7b3e1a4905c0/baluvukilavofajax.pdf
    • https://uploads.strikinglycdn.com/files/1ed688fc-cc14-4de1-b11c-bd2e7dac4d4d/tokafugudu.pdf
    • https://uploads.strikinglycdn.com/files/05123dc9-b31a-4471-b87f-4dd335800435/15557004497.pdf
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_e8b8fcc4de1d4f14a2ae852de6ef4c4e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/97a18d9e-3ced-4c1d-a328-0a237b195cfb/bissell_powerforce_bagless_cleaning_instructions.pdf
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_070eff2c955148ac86bb4e966a8e7af0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaba.bin
16e98f700a8ab9fb00e38b9c0b5acdd9750189da68c7ab4693a8695e28dbeaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 5068 bytes
font_01_sfnt_off0000fc10.bin
ba40fe044721d51c66744be2b204893d335523b4005f32a9cd19d6f2b987374a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 11244 bytes
font_02_sfnt_off0001226e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 4324 bytes

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