Malicious PDF — malware analysis report

Static analysis result for SHA-256 2036041d973e69ef…

MALICIOUS

PDF

71.9 KB Created: 2020-11-17 14:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88508d5a885256ea17d223e294a92d0 SHA-1: d6cd81dcbc00b399975ce94f75d506efeed41df5 SHA-256: 2036041d973e69ef03e978f4f18e6658609c07ff596a0a3a0c622365c3184d4c
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document's content is designed to trick users into engaging with remote support tools, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://cctraff.ru/123?utm_term=alternate+start+fallout+4
    • https://jozipomona.weebly.com/uploads/1/3/4/4/134479443/c2c77c7.pdf
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/2596952.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdf
    • https://komanibinepo.weebly.com/uploads/1/3/4/5/134588578/d3949c294e7209.pdf
    • https://zofomuwane.weebly.com/uploads/1/3/4/0/134040850/rugazokapano.pdf
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/e354a7809599.pdf
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/1256912.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wixanarer/98567826582.pdf
    • https://s3.amazonaws.com/rixevozajixezos/super_mario_64_16_star_route.pdf
    • https://uploads.strikinglycdn.com/files/fe58b386-6ae8-402d-8d51-f0d07e07f60d/sivusutirofitij.pdf
    • https://s3.amazonaws.com/jedaxopopuko/vojoxobunejuxi.pdf
    • https://uploads.strikinglycdn.com/files/bfd3d309-47a2-45de-9c15-324a56a92637/lefapumesomo.pdf
    • https://s3.amazonaws.com/mubefula/arteria_cerebral_media.pdf
    • https://uploads.strikinglycdn.com/files/37484a16-5aa6-4f28-9fcc-ae3c887e3301/29570447089.pdf
    • https://uploads.strikinglycdn.com/files/8f4981fd-3bed-40cb-908a-af3a91572dc6/lerodewitilokego.pdf
    • https://uploads.strikinglycdn.com/files/7b8ef8b2-6aca-4d8f-9e03-786a3ccd9067/29184416261.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_off0000df8c.bin
91d3057594b7f5812e593cd6718987b7be872cf81681bc3e38d80a552c400b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 4840 bytes
font_01_sfnt_off0000f012.bin
0fa997bf24c681663d97d2a57f488787f11711f30088fba9edd6240579ad2db2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 10248 bytes

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