Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec48684979d3430…

MALICIOUS

PDF

71.6 KB Created: 2021-02-15 08:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 323fe0e2d988afca5fde726f9872d067 SHA-1: ec7c93c6638875f7d43487154d1cdc99f4aa31b4 SHA-256: 4ec48684979d3430d1dabccd40ca22a4636830790211fdf0732170b5d82b81e2
146 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with one specifically linked to a 'ms drivers license replacement' lure. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it with high confidence. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=ms+drivers+license+replacement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5feff7f68e8e9.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/dRjgOhf/blossom_blast_saga_online_spielen.pdfIn PDF document text
    • http://tomogorman.com/fisco_agenda_2018_mexicoqn65e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fd08edc52770.pdfIn PDF document text
    • http://beramomu.22web.org/43646359932.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/4jcgcqc/29604446892.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/dPjhjeO/persian_god_of_light_and_truth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_60278334e23f0.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/Khdjdhg/indoor_go_karts_orlando_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/hhMgepN/bus_simulator_2015_game_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/ugdidbH/chocolate_cake_recipes_with_buttermilk.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/SgjOifX/free_music_ringtones_for_iphone_11_pro_max.pdfIn PDF document text
    • http://upgrade4me.com/subopadavenarajatalavitu5orli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5fe9acdadd7ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatovafibusatip.rf.gd/cartesian_to_polar_form.pdfIn PDF document text
    • http://wapofele.epizy.com/what_s_the_average_speed_for_wifi.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_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 5284 bytes
SHA-256: 09643673dcb6a453d24ebe256d6e78cdb3d0e935dd716b69a6ce1585898c95ba
font_01_sfnt_off0000ec71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC71 10848 bytes
SHA-256: f0151e513d0e1a1ee5b174dd14932e44624d38cd88d5befc854aa6ff781bb856

Open this report in the interactive analyzer, or submit your own file for analysis.