Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d0347233c356e6…

MALICIOUS

PDF

68.8 KB Created: 2020-11-13 19:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: da793bcef3dc3afa20c2b2db2d6df086 SHA-1: 72d0a573c594a79b16501aea6c48b934308f9b5c SHA-256: 62d0347233c356e65a51a22ad9f0e6578b50f008dd5b95cef00c6d3fa01f3cf7
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute traffic. One of the embedded URLs, https://cctraff.ru/strik?utm_term=victory+cry+persona+5, is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=victory+cry+persona+5 In PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/zobazedokatax.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/7613128.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/gomegufadaxilabu.pdfIn PDF document text
    • https://siforedovuwalo.weebly.com/uploads/1/3/4/7/134772634/229301.pdfIn PDF document text
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/04cabde.pdfIn PDF document text
    • https://renefifukidib.weebly.com/uploads/1/3/4/3/134343870/4077c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f88a9eca2312.pdfIn PDF document text
    • https://jumolixebeze.weebly.com/uploads/1/3/4/3/134352805/wijok_xamosam.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://s3.amazonaws.com/fowonaxul/cuisinart_food_processor_manual_dlc_8f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e449f52-4161-4f18-a40b-a84b479df714/tavawilubove.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/system_analysis_and_design_project_proposal_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a57494-aabe-4927-97d9-f127e0f43ce2/fapiv.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_off0000c3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B2 4872 bytes
SHA-256: 2647937cf2ffd021b54e61b7b3a6133c0a7d0efb7e786c94fb73433e496b0861
font_01_sfnt_off0000d450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD450 10624 bytes
SHA-256: 50213b694f7bd019e7cac132b2c50115c9543a7c08f00c0b0a360ccc69e46ef1
font_02_sfnt_off0000f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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