Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76155bc6ec6c451…

MALICIOUS

PDF

75.8 KB Created: 2021-02-16 21:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: c668a7afcfaedee252d752eb75506682 SHA-1: 681285cf5204233e4ae8e843990164b87c63529e SHA-256: c76155bc6ec6c4511adca591080e569e6a759b1d5a4e34e21c4b7bbc81a74abf
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and a link farm on disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=xblue+x50+user+manual PDF link annotation
    • http://fiterewupaz.22web.org/rolitofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_600743ff27e76.pdfIn PDF document text
    • http://cmb-accueil.com/aberrant_spectre_slayer_guidebm26i.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/WafujiK/gitewalapixejatenix.pdfIn PDF document text
    • http://jodazok.22web.org/cch_chuyn_file_thnh_hnh_nh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/rapafikovudutubomes.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/fnma_guidelines_investment_property.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/34085652537.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/magic_chef_ice_maker_manual_mcim30ts.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/relagifiborevuvido.pdfIn PDF document text
    • http://xadeboni.epizy.com/austrian_embassy_manila_visa_application_form.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_off0000ec4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5280 bytes
SHA-256: 0724b6d6d2c606c900ef697cb5bc75c1b27116400a9cd73dfa551a15f773e4b3
font_01_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 10660 bytes
SHA-256: 800069fe3122117ef7f55f00afbfbacecf3744a8171b608655dd730a1401706c

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