Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09a5ec99b14523a…

MALICIOUS

PDF

89.0 KB Created: 2021-03-16 10:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: eb7319a40bc0c6db469be94dd991267d SHA-1: dfc3a63df06d8f54fcd2e9be3339bfcd80afaa7d SHA-256: c09a5ec99b14523a5c6f324edf172d3d0bacaaa5c35ead89942f7a1376a7dec0
186 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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=daymond+john+net+worth+forbes PDF link annotation
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/nufuluvep-wawawe.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/jISwgew/free_psn_codes_calc_2020_list.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/senukijikobod.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/fgeyGa6/domino_s_pizza_menu_south_africa.pdfIn PDF document text
    • https://zewekoli.weebly.com/uploads/1/3/5/9/135966642/9a03b57c644b62.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/nokiviju.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/OAieoyr/bts_all_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuzopat/hekT3vB/xazoraluwiruzajomazadelap.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/8711953.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/fuvoduwilula.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/hbiaHOf/ragasudesunilizajene.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/nifiwud.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/gVMgiW3/reaper_pepper_challenge_videos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_85db0c81d1bb47bd9da6a6448b76ed71.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_75982fde35d241299a78ff7ba7b74178.pdf?index=trueIn PDF document text
    • http://zoweratizid.epizy.com/36924740762.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_a3c432f2b6e34041b8599adacd08b41e.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_cba18931f36745cb951b836a2805ec81.pdf?index=trueIn PDF document text
    • http://rofeluw.epizy.com/healthcare_quality_assurance_manual.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_91494b163f25455f84c645f47133945d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 5264 bytes
SHA-256: d4bbbae17b662bd2cfc899901cb682d9d85569b15462022682b3795c0a48e20c
font_01_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 11468 bytes
SHA-256: 14ce5eddc85bc62d4e45bf73d6d6d186fb7dd3a17242c6704c93605f15157263
font_02_sfnt_off000148b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3