Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f942c50e66201fc…

MALICIOUS

PDF

71.4 KB Created: 2021-02-25 21:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ce783983fd09af0182d4bcdc59dbccb2 SHA-1: a9c2119e8abbc3fd836d72fb8c87e62487ab1f6a SHA-256: 2f942c50e66201fca0d80e8595dd030cde24ffbc241ea1b9941c25c634ab67cc
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute phishing lures. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or session tokens by mimicking a multi-factor authentication prompt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://bologen.ru/strik?utm_term=lexus+es300+battery+location PDF link annotation
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/putosakaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/dGjbied/monster_race_today_results.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/fDjeXPX/the_zombie_smasher.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/wugemipa_pidatofase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_5fe8d91d84c59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415946/normal_60074e623a1e6.pdfIn PDF document text
    • https://cdn.sqhk.co/wevubuse/6ijbXgj/barbie_racing_car_games_free_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393033/normal_5fde84625458b.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/PihhdQP/laxolajen.pdfIn PDF document text
    • http://italy50wow.pro/dr_seuss_the_cat_in_the_hat_movie_fr80fjz.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/a1gjidL/82565834745.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/hjTUmZ5/rapukozaxoturopiw.pdfIn PDF document text
    • http://tomogorman.com/gps_conf_androidb9rz8.pdfIn PDF document text
    • https://lolimoxozidexus.weebly.com/uploads/1/3/2/6/132682882/5f3e1f48e89a.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/ihOhcMo/ice_cream_frozen_yogurt_healthier.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/8A03djj/59550945766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5352 bytes
SHA-256: 9e8bb1b19ef825273be9972cb2f937adc2ce21ffbb9cd6c9aedda2397b7ad743
font_01_sfnt_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 10376 bytes
SHA-256: 7eb0c46c8373b0f225b773cc8f8bce23fdd676418366b0dc7c24eb86eeaa3dc9

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