Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be409b3f7a38352…

MALICIOUS

PDF

78.2 KB Created: 2021-03-24 15:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f75a5786ea8e2ac51879690a8f3815a SHA-1: d82ac09b1099424d279a994627c6e9d6c62fe4b1 SHA-256: 7be409b3f7a383521b067cde8363ffadee6425bf442a3767884467dbbe505ef6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, many of which point to potentially malicious or phishing sites, suggesting a link farm or redirection mechanism. The embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=how+to+recall+things+from+memory
    • http://aycotoro7.xyz/age_of_republic_qui_gon_read_onlineu9s96.pdf
    • https://cdn.sqhk.co/mogujawogo/Ghf1jfw/juxonubozuluw.pdf
    • https://cdn.sqhk.co/fosuruzu/aOgdPAi/77101157526.pdf
    • https://retetozatinum.weebly.com/uploads/1/3/0/7/130775023/0689263c.pdf
    • https://cdn.sqhk.co/merabuvi/cAiwAjS/46706129762.pdf
    • https://cdn.sqhk.co/kinemefuwa/edPggib/drift_x_burn_download.pdf
    • https://kosefunoz.weebly.com/uploads/1/3/0/7/130775186/6677b5.pdf
    • https://cdn.sqhk.co/xafazunusa/jdihTii/bifeg.pdf
    • http://idealsit.space/dalokezopazilyf1ow.pdf
    • http://electriccannoz.club/dinerixd1mr.pdf
    • https://cdn.sqhk.co/fipimomozuk/Ogcbhi0/10969601877.pdf
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/1445931.pdf
    • http://snapchat-alert.com/fighter_subclasses_5e_eldritch_knighth3553.pdf
    • https://cdn.sqhk.co/noxisoture/iaXsjqS/dakobisivi.pdf
    • http://silkhfig.bid/super_goal_soccer_gameom97a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://magetasejo.epizy.com/34054006672.pdf
    • http://vozefure.rf.gd/frostpunk_the_refugees_guide.pdf
    • http://jonegukum.epizy.com/habitual_past_tense_worksheet.pdf
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_ea0b6dda1a82456a83cf784a078ad18f.pdf?index=true
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_c7f6a909a58a49d694432fb305cd1e2a.pdf?index=true
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_0070de9d584d49ffbb1d893d04b0ae3e.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_fc9b54c4d6b6407e9218c7386ef43cf5.pdf?index=true
    • http://bokatamekal.rf.gd/excel_combine_date_and_time_format.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_off0000f3d8.bin
5594f5bf7b65811ee477ae47d83c57fde3035be9192e7c6e81103245dcfa41e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D8 5448 bytes
font_01_sfnt_off00010649.bin
5b9564ee68a3ac734403aa07ff16e01375cc6e35beecea1c6610af4405cac546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 10792 bytes

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