Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ed5831e9859388…

MALICIOUS

PDF

72.7 KB Created: 2021-03-16 02:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42dc1591716990ffe0449f416230bc46 SHA-1: e54bac209c67f4f76cef1a32541dcbf85b2d95e0 SHA-256: 66ed5831e9859388c435220ff6dccca6607e2f158ad31417561c413c4916ae44
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain product-related keywords, suggesting a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=pioneer+ddj-sb3+serato+dj+controller+with+pad+scratch
    • http://nipawifaxupus.mygamesonline.org/why_isnt_my_ryobi_pressure_washer_working.pdf
    • http://nopotaz.medianewsonline.com/what_does_an_aws_solution_architect_do.pdf
    • http://shoop-fk.ru/bahubali_movie_dhivara_song_ringtonez767a.pdf
    • http://finuxezanasa.mygamesonline.org/how_do_you_cook_with_air_fryer.pdf
    • http://liwexun.mywebcommunity.org/chromatic_harmonica_chart.pdf
    • http://ropisunofo.mygamesonline.org/zulexufak.pdf
    • http://lovechat24.club/nokalif4nnt.pdf
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/turiwezurowuvunosuj.pdf
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/f5cab27248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pevarijidasalop/vpn_app_apkpure.pdf
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_96b679491f1642d3b5dcfc237d073fc1.pdf?index=true
    • http://ligoroxenafof.atwebpages.com/why_wont_my_dremel_turn_on.pdf
    • https://s3.amazonaws.com/kizugokofo/91008930492.pdf
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_36223966e3ef4086939e359316ff24e7.pdf?index=true
    • https://s3.amazonaws.com/fodose/mefurep.pdf
    • http://tulifal.onlinewebshop.net/felopezolotewofig.pdf
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_16d67c94e54f4720a9652a72847f220d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6c.bin
980cde0207a8bb8cd46594eeb657cb4794a4963d8c103ec812743403fd65f126		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 5664 bytes
font_01_sfnt_off0000efc0.bin
fe5b977bf3abb35ae3a8a8525ec63444c4ce4fcd3db279bf89ae047bbb5dba61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 12064 bytes

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