Malicious PDF — malware analysis report

Static analysis result for SHA-256 569c894b57786122…

MALICIOUS

PDF

73.0 KB Created: 2021-06-12 01:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bce4620eca9f84d36d8e0f9ca19c5f0e SHA-1: 5dd2bbd530a9931e84f1a72ace2bdc26d6fe7c4f SHA-256: 569c894b57786122427df592698bf01eb766ad98bc798f6ec828ec77af6891c3
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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://wastran.ru/pbw?utm_term=asq+se2+24+months PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373271/normal_60620ef602060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421040/normal_5fe03ecb3db72.pdfIn PDF document text
    • https://zipijovef.weebly.com/uploads/1/3/4/6/134623752/zotejogelapezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_600b5e3c1d016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_604d01e256b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402712/normal_602df9545af46.pdfIn PDF document text
    • https://kanazotevixif.weebly.com/uploads/1/3/2/7/132740718/kuziwisogesuxo-bijikunesegub-refekulow-wuxisudor.pdfIn PDF document text
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/d47eae.pdfIn PDF document text
    • https://kogovuvukadag.weebly.com/uploads/1/3/2/6/132682039/foferuforagujedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474750/normal_604339fa4bc10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375705/normal_6003a2badf5d5.pdfIn PDF document text
    • https://sufojise.weebly.com/uploads/1/3/0/7/130739234/27cba4692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_602679160da18.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4416806/normal_60b3619a2d0d3.pdfIn PDF document text
    • https://pofofeteb.weebly.com/uploads/1/3/2/6/132681268/28c88cd2b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491168/normal_5ffe6eef3a9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_6014cb9e63a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426971/normal_605d8223bcab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_60bc715ce7723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_602c3401900fe.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/nililawapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_6007d7242db60.pdfIn PDF document text
    • https://vizavidonase.weebly.com/uploads/1/3/4/0/134040461/runamavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_60b94df5e89d5.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_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 4924 bytes
SHA-256: 4a2185b862e778aa5e39a03e6ecce9a42c9c321e11e19a78b9dc11e012d342b6
font_01_sfnt_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 11180 bytes
SHA-256: e7d65d5de36bf6017e30d9aa36943baf59fbe311950bb63fefe357b3313bd935