Malicious PDF — malware analysis report

Static analysis result for SHA-256 64562b59eae5f529…

MALICIOUS

PDF

99.5 KB Created: 2021-02-28 04:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7d8fb0261573d0acf55274bbb941411b SHA-1: 9da0ac3f2b7207de21088af29e2a11195b63c457 SHA-256: 64562b59eae5f5293792734c003c5a497a00ea5af74580225835b56d9bd94406
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on dynamic DNS services and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'dungeons and dragons 2nd edition magic items' to entice clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wb?keyword=dungeons%20and%20dragons%202nd%20edition%20magic%20items PDF link annotation
    • https://cdn.sqhk.co/tixunudixa/eOzQuie/26588514581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_601db97eab4be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_600f236253f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_60394da1551a2.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/jgo4ht1/37305391158.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/2758137.pdfIn PDF document text
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/ff1c0928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501367/normal_6002a7a26d8d8.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/bixufol.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/Pjhhejd/89067466109.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/cCggIhg/73477023814.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/ggJvMDW/dimalopigebobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_601a62e3cad53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5fff005514d55.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/fiiGghx/wusosivifurarisurer.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/uhjaVib/nobuxexatukexonizab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 5360 bytes
SHA-256: 1d59a938572a51741c22968861d192fd3bd673cf396d697d96babf4c7f65ce3e
font_01_sfnt_off00015adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADF 11020 bytes
SHA-256: 313797b847537188b25e97b7018893c2874fa011219a795cfd634323ae45ea4c

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