Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47debc2a3d13fbd…

MALICIOUS

PDF

74.7 KB Created: 2020-12-24 20:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 368a7fb5801e8607d1b1d8af569c5957 SHA-1: d9fd30d9e3a266d4af00231acff557d2ce20f4f5 SHA-256: d47debc2a3d13fbdeb743e58b63d11eae539fa9c2c24bfc2072940eea6ce0140
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. Heuristics indicate it's an advance-fee scam lure, likely attempting to trick the user into visiting the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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.
  • 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://ggtraff.ru/aws?utm_term=angry+birds+rio+song+free
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fbc210cb720a.pdf
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/4370304.pdf
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fb2f7b1848ea.pdf
    • https://cdn.sqhk.co/jigidokasaga/eAjitrR/74850175229.pdf
    • https://cdn-cms.f-static.net/uploads/4443617/normal_5f9db59d97b35.pdf
    • https://cdn.sqhk.co/legifenobir/iiicFIW/ap_president_election_date_2020.pdf
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/fb8fcae52f1372e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xujitezu/dujidibotoras.pdf
    • https://s3.amazonaws.com/vuxalirudidel/67258354345.pdf
    • https://s3.amazonaws.com/vebogotexaf/complete_list_of_abstract_nouns.pdf
    • https://s3.amazonaws.com/nawosineromigi/zikujuvupo.pdf
    • https://s3.amazonaws.com/zuxadol/affairs_cloud_january_2019.pdf
    • https://s3.amazonaws.com/wukevirenesu/robip.pdf
    • https://s3.amazonaws.com/geraromu/86774600191.pdf
    • https://s3.amazonaws.com/fizaxo/wabibepujubogozogomo.pdf
    • https://s3.amazonaws.com/fifuto/58675557094.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_off0000e7e0.bin
9bd2a51abba74caca8d16563336a5cd49650e93114b4df1be1afd606dbb0d159		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 5064 bytes
font_01_sfnt_off0000f936.bin
3999599293cbb9dfc1231fd82919633de8560e10ff6ed77f492e76d9c8a98339		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 10872 bytes

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