Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c6114d1a81b7bb…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 17:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 31f68f22e8fed37a48b3b909f977700c SHA-1: be6058d567d1ef23cb4beef4a6ac88d04997d32e SHA-256: 17c6114d1a81b7bbed1298f47a29f35822176b0652f52b882c4395b0f3b11c65
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link farm and a phishing trojan. The document contains numerous embedded URLs pointing to disposable hosting, designed to redirect users to malicious sites. The presence of a link to 'yafferge.ru' with a 'disneyland+map+pdf+2020' UTM term suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://yafferge.ru/strik?utm_term=disneyland+map+pdf+2020 In PDF document text
    • http://bukejasinopa.22web.org/pupewoxudipogides.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/5303214.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/cNaifji/cake_decorating_supplies_online_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/iVij2SG/28763524116.pdfIn PDF document text
    • https://norabemomo.weebly.com/uploads/1/3/0/9/130969424/3a44b4bff0757d2.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/ie4ghhc/sizoku.pdfIn PDF document text
    • https://rupilobeva.weebly.com/uploads/1/3/0/7/130775598/jaroremine.pdfIn PDF document text
    • https://fomememuvur.weebly.com/uploads/1/3/4/0/134000402/5465088.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/sifavapiwojoza.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/jGJVcWh/splendor_game_target.pdfIn PDF document text
    • https://zimekepipo.weebly.com/uploads/1/3/5/3/135351260/pevabezuvut_lopez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95a1f3a-2c60-4aae-bd9c-2810f8bb5c65/wolf_gourmet_countertop_oven_manual.pdfIn PDF document text
    • http://ziwufuv.rf.gd/netflix_movies_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7475af4a-e430-4791-8ba4-b3a50c9eedd7/whats_the_difference_between_my_cloud_and_my_cloud_home.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/62760951153.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/boredom_definition.pdfIn PDF document text
    • http://rebogarupoza.epizy.com/20881740304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/837f4cb2-f056-4496-b2dd-0d2ebf9ee862/is_sao_16.5_canon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c97ccb-afac-4fcd-8008-4e1b095d2b74/kixumubob.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_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5468 bytes
SHA-256: b17820cbf84f3ad69848fc397bcdadf8b6dfdc1349ec35e93df3818d1b998801
font_01_sfnt_off0000f5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E3 10516 bytes
SHA-256: 29fb7c535b6f84f40215199a5c44e1f1235133343533f3d865d11329285446cd