Malicious PDF — malware analysis report

Static analysis result for SHA-256 565d2a500306b6a3…

MALICIOUS

PDF

76.3 KB Created: 2021-04-26 13:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 26801dfd1c931eba4152421ca41bccb0 SHA-1: 4b622cd697bd1fc24776338d3dff0efc90764554 SHA-256: 565d2a500306b6a353a15955af9b7da59fa23f02202264c30a431892dbbcdba1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=wendy%2527s+nutrition+menu+calculator PDF link annotation
    • http://mynasert.online/i_dreamed_a_dream_glee_sheet_musicm75e5.pdfIn PDF document text
    • https://vebovaxuzukikom.weebly.com/uploads/1/3/4/3/134352383/zudujogox.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/A5hfjcg/98518002397.pdfIn PDF document text
    • http://testrun.ru/arabische_schrift_lernen37pvl.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/77122982065.pdfIn PDF document text
    • http://flowerport.market/48505238321j5kx3.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/Hf7amgj/hero_wars_unblocked.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/8181500120.pdfIn PDF document text
    • http://twirlini.com/lijan54nds.pdfIn PDF document text
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/0cfd2ba3e.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/motejixupuxixodila.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/gagowob.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/3546003.pdfIn PDF document text
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/mufati.pdfIn PDF document text
    • http://trysalon.xyz/75364082539whvqb.pdfIn PDF document text
    • https://soruxepamoni.weebly.com/uploads/1/3/5/9/135992355/1f9dae53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/46002291371.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/41726506834.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/38702221630.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/internet_speed_meter_app_for_pc.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_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 5232 bytes
SHA-256: 192926a921aa339db31322d94bdee8c538a6c52faaebf20be49d1f9d0947d192
font_01_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 11784 bytes
SHA-256: c1263d7a903069d9165b05d60dd072b069d821407043ce3b8ca8d35745177834

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