Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d01546dd35de1c…

MALICIOUS

PDF

79.1 KB Created: 2021-05-29 16:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60bd7229153df51f0d45556ff442ec96 SHA-1: ac7c7dfcee941ffbe621087326b887a09713ee44 SHA-256: 64d01546dd35de1c07740238ba55f7f60789e2d2add580c656e9219230d2cf36
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The primary heuristic indicates an advance-fee scam lure, and the ML classifier strongly flags the PDF as malicious. The embedded URLs likely lead to a second-stage payload or phishing site, consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ponafet.ru/strik?utm_term=universal+serial+bus+controller+for+windows+10
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/kosewazam.pdf
    • https://cdn-cms.f-static.net/uploads/4393626/normal_606e8ef92cec0.pdf
    • https://zuxobopabure.weebly.com/uploads/1/3/4/3/134344154/71ab8d4a49cf2.pdf
    • https://nebijuwako.weebly.com/uploads/1/3/4/3/134376342/8950e67ee56.pdf
    • https://tozuriko.weebly.com/uploads/1/3/1/4/131437247/9638696.pdf
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/9459700.pdf
    • https://cdn-cms.f-static.net/uploads/4447089/normal_601fda06e4dd0.pdf
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/xorurubowoniganate.pdf
    • https://zexorekimapuwip.weebly.com/uploads/1/3/4/7/134702453/bb60df02a.pdf
    • https://cdn-cms.f-static.net/uploads/4485813/normal_600d113a4f2d8.pdf
    • https://cdn-cms.f-static.net/uploads/4365649/normal_604b3f73839ad.pdf
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/7224700.pdf
    • https://morupataniseb.weebly.com/uploads/1/3/4/5/134502176/c3ff8069e2d2401.pdf
    • https://lufapaxate.weebly.com/uploads/1/3/0/9/130969762/1255096.pdf
    • https://femasubukodulis.weebly.com/uploads/1/3/4/4/134489748/2228270.pdf
    • https://cdn-cms.f-static.net/uploads/4490122/normal_6035a15bcec27.pdf
    • https://cdn-cms.f-static.net/uploads/4473954/normal_6044627c849f3.pdf
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/bebezix.pdf
    • https://zekawumili.weebly.com/uploads/1/3/4/4/134403966/vidof_miseguvafomusow_futanagafijile_wexajafo.pdf
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5fcb017fa3f35.pdf
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/409e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f609.bin
63c77293fae4029a3e060f5f09bc2923e2a545b85f2becc9e040020ab6e0c655
pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 5492 bytes
font_01_sfnt_off000108e3.bin
f61966b36b9db764e7a89604ea4506749acfa90b3655fcac94fa787b9ef746e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 11132 bytes