Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cd4e4423c4ef92…

MALICIOUS

PDF

70.4 KB Created: 2021-02-27 02:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c69ef2dc2074c03fe5e9008422544230 SHA-1: 26d7239513ca2e5579f28acbbb69d07d42abe628 SHA-256: 04cd4e4423c4ef92e9026dcb2acabcd995f6347b0d64c5e7d034d5f6a231f795
126 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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or redirection scheme. The document body, though obfuscated, contains a search query related to "criminal justice system in south africa", likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=what+is+criminal+justice+system+in+south+africa PDF link annotation
    • https://xafovudomogagak.weebly.com/uploads/1/3/5/3/135324285/7232697.pdfIn PDF document text
    • http://doporujela.iblogger.org/formation_of_autophagic_vesicles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_602017a11450a.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/aec579bf436.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/44733562247.pdfIn PDF document text
    • http://bokazisenu.22web.org/android_tv_1080p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479237/normal_601da8123f020.pdfIn PDF document text
    • http://bigakeka.iblogger.org/73289057388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvotadaxiti.epizy.com/21085660093.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/larodokifodenogizokafe.pdfIn PDF document text
    • http://tepojeno.epizy.com/76517265960.pdfIn PDF document text
    • http://teramadobowakin.epizy.com/45241408720.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_off0000d806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 5312 bytes
SHA-256: 87ea32266ae9843075fcd5a2bd7b0fc6ec11ac2bf089fa32d1b7fe013cebab3b
font_01_sfnt_off0000ea04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 10200 bytes
SHA-256: cf4dcd883bb5133b19cb1d1eca2ff7b1b08bce649a745ccf36ef9b44c22ce77e

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