Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b52912f71dcefce…

MALICIOUS

PDF

101.3 KB Created: 2021-03-08 17:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e6d832cc03769402d25700098117ea74 SHA-1: a573414a8c8f5d768a8f936e7931699c281ed32f SHA-256: 1b52912f71dcefce11c6e0fbca683738dc0f41a677af2f372986ba5ed2c46161
96 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'cellulose extraction pdf' and mentions 'wkhtmltopdf', indicating it's likely a crafted PDF designed to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://seumenha.ru/award?keyword=cellulose+extraction+pdf PDF link annotation
    • http://runojiwum.getenjoyment.net/answer_key_plate_tectonics_crossword_puzzle_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/ijkEdgc/47949266552.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/dCjdjjc/11458292556.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ffb20258fad2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5ffdc3c6ed6e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_6029294d1c601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_603416cc469db.pdfIn PDF document text
    • http://wersita.fun/71180894682egckk.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/geBhiif/mawulaxe.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/5_scale_rating_strongly_agree.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/sokibovabosale.pdfIn PDF document text
    • https://cdn.sqhk.co/miranilu/TxYthba/tip_tippy_toe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_5fd9da68f404e.pdfIn PDF document text
    • http://stopnutristrike.ru/explosion_box_template_free_svgb03wp.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/ajgV5CT/mortal_kombat_xbox_one_fatalities.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/deka_ceiling_fan_installation_manual.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_749164e03c63406a93fc837702885f21.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_2a8c5aee34d84948bce0c673b933a53d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/child_support_agency_australia_forms.pdfIn PDF document text
    • http://titugol.atwebpages.com/lolumapipopekipoxadatu.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_7a97a47d5c0e41a19a0a5f5ff57f1cf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/xowikewameporajeliw.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/dark_wallpaper_hd_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/14873135396.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 5124 bytes
SHA-256: 6c9cd3634ebc8121f1c149409a8de3ccfb7edb4d67bc754754be5af24598743c
font_01_sfnt_off00013151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13151 15816 bytes
SHA-256: 9e247683d487623032505bae19b11fef83be5e6758c3a31aac774d6f4773d6ac
font_02_sfnt_off00016269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16269 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d
font_03_sfnt_off00017701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17701 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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