Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfd970146f60951…

MALICIOUS

PDF

60.9 KB Created: 2020-12-24 03:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187f42f5f847195e730c978063c0c817 SHA-1: b25910cd584f8144ad0bc509ecc6d5155c7550c6 SHA-256: 5cfd970146f609512da9aec360df19b38ae2dbdf8b5741ec0ee54f6664d81420
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a PDF SEO link farm and a critical ClamAV detection. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffe.ru/strik?utm_term=map+minecraft+1.+8+9+dropper
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/resazekubajumif-kesasoxu-fakevorubu-tikovagotadigi.pdf
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/8753801.pdf
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fbbe75dc4c33.pdf
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/9706699.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f234df40-597f-4481-811e-9814aa079eac/buxajopakege.pdf
    • https://uploads.strikinglycdn.com/files/304ef937-4d26-4d3c-a740-0aef22a834be/saunders_nclex_rn_5th_edition_cd_download.pdf
    • https://uploads.strikinglycdn.com/files/09ecd190-3ec1-4589-8bfd-9202143951dc/bozofipitugoju.pdf
    • https://uploads.strikinglycdn.com/files/9b821958-f086-4910-8a2f-a71dea22abc2/money_a_user_s_guide_laura_whateley.pdf
    • https://uploads.strikinglycdn.com/files/44e5b4cd-2406-47cf-9ae6-baccc9073519/53044781647.pdf
    • https://s3.amazonaws.com/mawesenasijoser/vekelebewagoxefozowabegod.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_off0000b020.bin
b1c618bd0df8800173ee5b3d173bfb1a15016943c1fa0dc7ab8c6b57075ad81d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB020 5528 bytes
font_01_sfnt_off0000c2f0.bin
98a961816b2b19b440f799da1c83dcd1f4df077a4fa13ab88bb638f9441b2471
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 10668 bytes