Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe113bffc5996173…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 19:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8b6e09fbd2277b74129282f3917c5fce SHA-1: f9a9ea064f05ebb9f18f4aecc65f524d732777d3 SHA-256: fe113bffc599617325e414d6533ca74170e08fc0dcafbea80a98e2a3fd3816bb
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm designed to redirect users to external websites. The presence of numerous external URIs, including a link farm on disposable hosting, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to directing users to malicious content or further exploitation.

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 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.
  • 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.
  • 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://botokaw.ru/strik?utm_term=white+christmas+movie+poster+framed PDF link annotation
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/9194683.pdfIn PDF document text
    • https://nulasexojexof.weebly.com/uploads/1/3/4/0/134012614/gukupufalukewowukuka.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/gjbidgj/sijojovagapo.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/45cd590bde2c6e.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/lekozugakuluzi_veluko_bogimuwonaxe_zubukusow.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/7367564.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/tepotakum-rusomadazet-voxuf-wonumawe.pdfIn PDF document text
    • http://kengoru.space/sogelefagixunivunivejumeequ0p.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/L2nhcgc/xotubodegawusuzerelaf.pdfIn PDF document text
    • http://lyudi23.ru/jump_jump_ball_2018_apkaifg6.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/jjjhh3q/posus.pdfIn PDF document text
    • http://tameenegypt.com/jumekudotomo0r2.pdfIn PDF document text
    • https://turudesufexo.weebly.com/uploads/1/3/4/1/134131379/4532190.pdfIn PDF document text
    • https://wubedekajonew.weebly.com/uploads/1/3/1/3/131380741/dopojugagemejijefag.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/7683709.pdfIn PDF document text
    • http://stepka2016.xyz/inkheart_novel_short_summary33i4k.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/gedimuta/gageki.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_d59145a7bf144b98b49166b88e7a4844.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiduro/oracle_cloud_payroll_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/sezinaw.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_85ed180406424eb283612dc0bb811b12.pdf?index=trueIn 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_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 5436 bytes
SHA-256: 01cc7a29ed5757f0b9363d38d60190c2b30939280e86f6daf230caaae1b57d5e
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 10328 bytes
SHA-256: eff9640c2d6d7cc169e66bd595f2abcb50ce167253bc0f23839418397367bf2c

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