Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2b8aec3b4a9553…

MALICIOUS

PDF

89.5 KB Created: 2021-04-08 07:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 220ccaafa1620ac5488bb12b808e3e54 SHA-1: 2d40b8642cf4f8c5684ee3c9c9f554f296e273a4 SHA-256: df2b8aec3b4a9553957a3ee246de5951673e2a99120ee5014c3f1c6d21488f5a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to academic materials, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://maypoin.ru/wix?keyword=realidades+2+examen+del+capitulo+1a+answer+key
    • http://metazoaapc.fun/bavuwamowobyzd0o.pdf
    • http://sirunome.mypressonline.com/brexit_deal_draft_agreement_in_full.pdf
    • https://static.s123-cdn-static.com/uploads/4455374/normal_60026775c3255.pdf
    • http://gufutaca3.xyz/flvs_geometry_module_2_pretest_answers75y7h.pdf
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5ff8fd2f6cf5c.pdf
    • https://static.s123-cdn-static.com/uploads/4408595/normal_5ff5fe440e7b4.pdf
    • http://tejovotemikodes.getenjoyment.net/xepopokelugivavifubab.pdf
    • http://izzzaaa.space/366531721107pin9.pdf
    • http://bawilidow.mypressonline.com/jejopaponi.pdf
    • https://static.s123-cdn-static.com/uploads/4386092/normal_60044eda4c8ce.pdf
    • http://pochta-24.cc/philips_norelco_multigroom_5000_walmartpbhh0.pdf
    • https://cdn-cms.f-static.net/uploads/4487927/normal_604b00ad15584.pdf
    • http://ins.expert/sound_about_apk_old_versionctv5c.pdf
    • http://govuled.mywebcommunity.org/futovujumibewamedupoxil.pdf
    • http://lowazaz.22web.org/abaddon_dotabuff_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jafesok.epizy.com/laxomoloxavopagureg.pdf
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_f6cae52ec2364b12a87ce712499ecb59.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1718bc25-3b5f-45e2-991d-d593632626e5/how_to_use_music_and_talking_hbs-730.pdf
    • https://uploads.strikinglycdn.com/files/7acd97b8-1284-4d4d-8c6c-a6be8af65d77/zasekifotefuduwuzaw.pdf
    • http://fogaripopuna.rf.gd/10th_class_maths_guide_telugu_medium_download.pdf
    • https://uploads.strikinglycdn.com/files/7c282f6b-6f87-421d-9a99-27542a6c71b3/windows_7_loader_1.9_7_by_daz.pdf
    • https://uploads.strikinglycdn.com/files/2757e354-ddb2-4914-b395-9a23fb55d60f/11275605602.pdf
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_b86159085dbe48908b3a8137e3eabb49.pdf?index=true
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_cda8ee61acfd408ab3681022e3b61a5f.pdf?index=true
    • http://bamonoxo.onlinewebshop.net/fifth_third_bank_job_application_status.pdf
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_ac0cc9e630974677be0407ba5c4c92b5.pdf?index=true
    • http://bibedufuranuju.rf.gd/bokumifo.pdf
    • http://rabijeno.epizy.com/adobe_illustrator_logo_design.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_off00010181.bin
eca8d569324d8cb8fe9c8ec2a0686c57eae180b8750879c9b3fa3367907638af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 5736 bytes
font_01_sfnt_off0001151f.bin
7a0bcbf7eece34210e64ebccd3f97a169132aee489611e2ebd4a2c2be351125c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 14928 bytes
font_02_sfnt_off00014314.bin
f8f877f4678a5d26365c9374367101c5b6daaf4e191706acd740efbd03a3d949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14314 16060 bytes

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