Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b872facb8e9be7f…

MALICIOUS

PDF

92.5 KB Created: 2021-03-14 21:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d5c651a513a3baf153b113ec3c26b6 SHA-1: 0192028e72e144b659ec3d8c2fa862ac77565133 SHA-256: 2b872facb8e9be7f00b3b625c2175a21b96657a95697382cf080dd6ae091c22d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to '2020 security act' and the authoring application, suggesting a lure to trick users into visiting the external URL.

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://druttle.ru/wix?keyword=2020+security+act
    • http://vexidizagopukib.22web.org/variedades_de_cafe_en_mexico.pdf
    • https://cdn.sqhk.co/xoberuweri/ekgiDic/beautiful_background_for_iphone_11.pdf
    • http://pofuxujeku.iblogger.org/volulasujosugokegejiwu.pdf
    • http://vefejukexasiku.iblogger.org/love_story_song_lyrics.pdf
    • https://cdn.sqhk.co/ripalufix/eoibpij/24860949239.pdf
    • http://dexavakisepo.22web.org/knee_to_chest_exercise.pdf
    • https://cdn.sqhk.co/gifidupuzuv/iiKuhiC/31557753886.pdf
    • http://bet-info.ru/40981412263pkdyv.pdf
    • https://cdn.sqhk.co/naziwixolagu/DhchKjf/bobuziziji.pdf
    • http://divuwon.iblogger.org/blender_animation_software_tutorial.pdf
    • https://cdn.sqhk.co/purorenutuw/zjesifG/94982506962.pdf
    • http://sifusebidokud.iblogger.org/90729588674.pdf
    • http://werenntaq.online/playstation_vita_emulator_apkf6nhc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_22c34f2436f24faa86ba7d0b62a8d157.pdf?index=true
    • https://s3.amazonaws.com/xupimaral/sundari_penne_video_song.pdf
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_1dc578d5c7124abdacdc5ce5a6518b46.pdf?index=true
    • http://rimupikerotazes.rf.gd/fcpa_resource_guide_2016.pdf
    • https://s3.amazonaws.com/posaxugidut/indian_constitution_in_kannada.pdf
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_e23f70367328459485b8494deda7cb4c.pdf?index=true
    • https://s3.amazonaws.com/wuvepilamamuse/was_the_world_shut_down_during_spanish_flu.pdf
    • http://xegilejefaga.epizy.com/free_photography_flyer_templates_photoshop.pdf
    • https://s3.amazonaws.com/luxelula/47586679521.pdf
    • https://s3.amazonaws.com/jejulurowev/tabla_periodica_blanco_y_negro.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d41.bin
d23d3b3a7882914bb91e7ea2bde69dec89bc4b56354c807b26729a498c5fba0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D41 5044 bytes
font_01_sfnt_off00013e7b.bin
b24c71091681c8ceaaaf1540204fe70ed11ca38558ccbb92d47ca6b4b20b65f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7B 11292 bytes

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