Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3d6d55b7343901…

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 03:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c6902e3d0d10da8ef029b9c3fdbc0d6c SHA-1: 2aa4c284d24880b58e88485153b0bed21881575a SHA-256: 9d3d6d55b73439014d0321be20972f9418dbfaf896a35b16e05ea896a8481d73
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('ponafet.ru') that is likely used for phishing or malware distribution. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=venn+diagram+example+2+circles+blank PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425492/normal_5fe412faba6b4.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/31959530508.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/viktor_frankl_mans_search_for_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/38947241162.pdfIn PDF document text
    • http://nukotim.iblogger.org/biology_textbook_grade_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_601e686e34bdd.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/46429776201.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/22133978009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_5fe98dbc3d8d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60201966c8a39.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/sunbeam_mixmaster_heritage_series_2353_replacement_beaters.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/file_a_police_report_san_diego_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/22621155598.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://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_b5309eab5e5d4ab3ad368cbcfc6643c6.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_20bfe62f7c63469192015db205be7f78.pdf?index=trueIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_9b2ca9991c2949bf935f92c64f9b2b51.pdf?index=trueIn PDF document text
    • http://jasisogurajis.rf.gd/paragraph_of_the_week_middle_school.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_7c1b3be3d19744578b9b3cddb2115e81.pdf?index=trueIn PDF document text
    • http://litufowanukoro.epizy.com/pudenawukojubujunama.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/25111881858.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/evenflo_chase_safety_rating.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5360 bytes
SHA-256: eac44ffc333681440fdc8371a1363246baf9da5c92cfcd3269990b2faf465584
font_01_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 10232 bytes
SHA-256: 33f87afd034a515fefe017cbe9b62ae3ac6435e53685ea953085b98dcef3ebfd
font_02_sfnt_off00012305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34