Malicious PDF — malware analysis report

Static analysis result for SHA-256 db11b85d1f396e06…

MALICIOUS

PDF

81.0 KB Created: 2021-03-22 11:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9a5f67a62ea3b56d7fd7ec411f2f59c SHA-1: 706714569918a178eba13455a96ebe9110d71b74 SHA-256: db11b85d1f396e06de6aa5ebc344800744270896ba2a9dd08c0d3ae1aed73eca
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a high-risk indicator. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a game guide, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=poe+incursion+rooms+guide
    • http://fresh-ita.space/blette_information_nutritionnellei7y6b.pdf
    • http://xuvaxujogilo.mygamesonline.org/72290352272.pdf
    • http://giveaway2020.info/73360550974lm961.pdf
    • http://kotudekudoges.getenjoyment.net/82463478398.pdf
    • http://kurixuj.sportsontheweb.net/bokufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/50f029a0-1c12-44d9-8f9a-4b10a49eb5de/mibafaxifatisowaz.pdf
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_7579007938a14d76b305fdb86724f1a5.pdf?index=true
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_39bb3afdb7934e51a23741dcd745f46c.pdf?index=true
    • http://woporebokut.rf.gd/alelo_genetica.pdf
    • http://soxarigur.myartsonline.com/15375855505.pdf
    • https://uploads.strikinglycdn.com/files/773739bd-ba4a-40b7-9a61-53526fa31bc8/rafajudaparojamabosopoga.pdf
    • http://genuziga.epizy.com/actuator_valve_working_principle.pdf
    • http://tupaguwojisese.rf.gd/english_major_let_reviewer_with_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/41117aed-0e82-4d3e-9c6d-9a2d8d1c8669/49237280268.pdf
    • https://uploads.strikinglycdn.com/files/c8d13fc8-2733-4e39-802c-468cf4943775/what_do_the_lights_on_my_arris_router_mean.pdf
    • https://s3.amazonaws.com/jeduzizonox/mechanisms_of_evolution_worksheet_1.pdf
    • https://uploads.strikinglycdn.com/files/0c135be3-2a51-4cea-a4e5-ddabac971dde/85984299975.pdf
    • http://kokokifutalikop.epizy.com/ruzekanifalotunip.pdf
    • http://suvalomimo.atwebpages.com/dusk_till_dawn_lyrics_translation_in_hindi.pdf
    • https://s3.amazonaws.com/kavugusepe/26437603146.pdf
    • https://s3.amazonaws.com/jafujasiwetid/64780673159.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_off0001006a.bin
52855900b0e57763d9fa01899e11d15bb9599e24ae620ee81704311f416b6b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 5020 bytes
font_01_sfnt_off00011165.bin
bc791f2e61c2cc5d5a3b987f809e386257756a9b4b2fcc71fb4840b11b152152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11165 10872 bytes

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