Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d055414f7ef49f…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 09:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 674fbf53690ff8e03533f66518a84ff2 SHA-1: 2a468c3e9e33227cdbb4129a5f4eb892ff886497 SHA-256: c9d055414f7ef49ffa2c67a8786b7827079d27b2407d30182a67d3a5bddccc32
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. The embedded URL and the nature of the link farm suggest an attempt to drive traffic to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=charlie+and+the+chocolate+factory+famous+lines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468831/normal_5fe208ac9036e.pdfIn PDF document text
    • https://webemibas.weebly.com/uploads/1/3/5/2/135298215/kisekan.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/majezolekin.pdfIn PDF document text
    • https://konupalak.weebly.com/uploads/1/3/5/3/135315701/351353.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/ba5bbecedbd2.pdfIn PDF document text
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/4021871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_6041bb1823513.pdfIn PDF document text
    • http://fixisotaj.22web.org/fovuwasowutiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_6057b10cab227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5ff8a6df9f6e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403414/normal_5ff03e703236e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_6043e797341e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_604e8cda83660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_603cbb407551e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcef34a8c6a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_a602f7f252034144b0856790c55996e2.pdf?index=trueIn PDF document text
    • https://e44de090-c64a-4a0f-b555-2784aa0ac37b.filesusr.com/ugd/41d583_c7bdeef00a0a46b9933ada8b111771cf.pdf?index=trueIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_063d86f1e6cb4bf18476f7cf37d18e71.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_090f996ef7654556886b0a3118850274.pdf?index=trueIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_a5d8d5c561e645e087eaae1eace92e77.pdf?index=trueIn PDF document text
    • https://13006a6e-9b3f-4191-9e3f-064114488741.filesusr.com/ugd/34464a_32893e80affb472eacd6b2efab14176b.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_7a8fa22b41aa4bf58a71f8a4b0d91412.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_1cfca269c954487f8a0dbddfbe2c61d8.pdf?index=trueIn PDF document text
    • http://muresapidun.epizy.com/electronic_access_control_thomas_norman.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_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 5268 bytes
SHA-256: 97ad0bba7ee2a285f77eb4aa621dea79beb8e24f69f10bccd6b9e1a0f678523f
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10484 bytes
SHA-256: a2d39bfefeb3ca4d843e08cfddac753c81625165cbf401f65963f8db19bb8454