Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6e259def449af7…

MALICIOUS

PDF

77.3 KB Created: 2021-03-25 15:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e0f421d18cf4dd6aba3b956ace20f23 SHA-1: 578501bc54d890621edc32f56261cb48745c70df SHA-256: af6e259def449af72607a025ce898d84163df9654e4b1b5fb0a6b049aa6f5dec
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and a heuristic specifically flagged it as a link farm designed for SEO manipulation. The presence of a 'download' lure suggests a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites for malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=manager+6+crack PDF link annotation
    • https://cdn.sqhk.co/difakezil/iahd183/45619161625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384836/normal_5ffe659ac0864.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/i78Qbhc/at_t_thanks_hbo_max.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/Hvkxjh1/momifurerupaxeruviwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_6001abcf0eef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_601fe24e8b31b.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/jbahjgf/4072156080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_604116bd4dc96.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/dodutegud_wevogosonax_mibomaromobev.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/pomomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luropiw/22847715261.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_c611456c1208486883a5445e60fc370d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07325c66-b7c6-4dda-bc71-b2ab6c24ca08/galumogup.pdfIn PDF document text
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_34b813dec3104e0a8b3768ca295b6dc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/diccionarios_biblicos_en_gratis_para_descargar.pdfIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_0d57d412881d4d0d86a03963a186d729.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_98e9370aedc2419084347b23c5e411e9.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_af9ded92d3354a7992a39030261b382a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b92e15-1cd9-4c1a-8075-e4d9a08b9940/73966754070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc80f0c-902d-4ca5-bf3d-116e79afe297/79748073951.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/solving_equations_puzzle_worksheet.pdfIn 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_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 4980 bytes
SHA-256: 4ef631fd451295b2b21fd83ec7163b0e97bf4c7b7c48c5b37ac88d7b70dd74cb
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 11856 bytes
SHA-256: c2637155094c61c238d2467b3d3ce2d7a301380399aa13a2e6bfa4d542b066f9