Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eff75dbe902412…

MALICIOUS

PDF

83.5 KB Created: 2021-02-12 07:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05da715c9a9af1a623e7d8a3e4ee3af SHA-1: 77716f8610fe7c1a3ac4e6709f0c2911e547aee0 SHA-256: f4eff75dbe9024129ffe7d0f2c8d01e61be6e0d451058783c447fa4ee429f202
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=foobar2000+themes+2019
    • https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/pulajoxi.pdf
    • http://sagokorize.22web.org/73793007745.pdf
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5fcd56f95a813.pdf
    • http://vijoxufomodazug.22web.org/online_video_converter_karne_ka_tarika.pdf
    • http://lovechat24.club/steel_shooting_targets_near_me4osf1.pdf
    • http://trokot-shtorki.online/47702028927g44tt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zilifafaxizi.rf.gd/kuzamu.pdf
    • http://dujawupiraxep.rf.gd/52918880772.pdf
    • http://rusogiwelak.rf.gd/revur.pdf
    • http://bawaluzobadomi.epizy.com/gunirixanozi.pdf
    • https://s3.amazonaws.com/kosamupim/the_boondocks_full_episodes_free.pdf
    • https://s3.amazonaws.com/vixuwogetiv/communication_manager_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/wujanozo/vogofuzasafamogevuxuf.pdf
    • http://bubaregelore.rf.gd/48228164383.pdf
    • http://dulubuli.rf.gd/mc_command_centre_guide.pdf
    • https://s3.amazonaws.com/solonebosop/zisanubolobos.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_off0000fdf3.bin
ed7222961bb5c5870dd6d3d17e365dac857af43071f15c3681e3faaa39983e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 5104 bytes
font_01_sfnt_off00010f3d.bin
f23a276747a4cb7d043b18c2318e56e57fa5e2729c6c99b19eeb5aad41485d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 10544 bytes
font_02_sfnt_off0001334b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1334B 4324 bytes

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