Malicious PDF — malware analysis report

Static analysis result for SHA-256 906314f3e6fabae1…

MALICIOUS

PDF

94.6 KB Created: 2021-04-07 11:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afb82f14c9bc5e974f43dd1be0fd4197 SHA-1: 2c7cc9ba0ac28430c4c2f1f08ddaaedc8dc3a659 SHA-256: 906314f3e6fabae1f95270f79958100affd248ee95a85a5749292fb7daf16d0c
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary suspicious URL being https://seumenha.ru/strik?utm_term=mame4droid+0.37+b5+roms+download. This suggests the document's purpose is to direct users to potentially malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=mame4droid+0.37+b5+roms+download
    • https://cdn-cms.f-static.net/uploads/4452199/normal_602bb77e77ecf.pdf
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/vonefunereri.pdf
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/lasug-difibujilo-vapupujuna-fovaxomizo.pdf
    • http://playmarket-online.com/83148459188inph0.pdf
    • https://piramejujidizek.weebly.com/uploads/1/3/4/6/134694247/gibaloradalidajogi.pdf
    • https://static.s123-cdn-static.com/uploads/4490252/normal_5fe57e77f078c.pdf
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/7829484b13cf8.pdf
    • https://xadadoroz.weebly.com/uploads/1/3/6/0/136024884/melamijadagad_tarikip.pdf
    • https://cdn-cms.f-static.net/uploads/4376850/normal_6048bf1c2799b.pdf
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6045f61dc7c26.pdf
    • http://de-bewertung-id-q2e5t23.top/nails_salon_for_salerwoy2.pdf
    • http://hustlinmoney.com/25339936149wlatd.pdf
    • https://cdn-cms.f-static.net/uploads/4383807/normal_6045c05a0b0fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_6f9b0283539d4600ab331f7497db7631.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f47214ce-9cbf-4859-9e8f-4b3f572a0a97/norufutox.pdf
    • https://uploads.strikinglycdn.com/files/052f8177-b2b4-41b4-b695-e66f60efbe70/wefelelasojuxagiwewowuwu.pdf
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_155a748fbaa849dd91a9fb010ec8a354.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6afa7a76-1c03-4af3-8782-f211c8419b8a/58366605152.pdf
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_3d4dc5b775ce4fae93c8356c90624495.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2154be49-e10d-4331-9ecf-450f1c8aa9ae/bugawofoz.pdf
    • https://uploads.strikinglycdn.com/files/ede43fc7-8a44-4ec8-9253-24e6ce40a289/how_to_stop_lg_direct_drive_washing_machine.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_off00012c73.bin
5fb7f74bafbe105e464bb28a95a3ff5e628a0f109c8e63f8238660945daf6a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 5840 bytes
font_01_sfnt_off0001406a.bin
571e0eff5dc5825fc620de4e1dfd0c7b2a9ad796221511cb3d2f11da1b1006ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1406A 13188 bytes

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