Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cffb2caa98f256…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 00:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 521ab26d872a366615078866accba621 SHA-1: efdf55a84b01fb0ea6b8ed9eb221bd52d436c65f SHA-256: 83cffb2caa98f256207dc36769fe4a2675547387e44e73bc7b8a129d979629b0
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

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://mezovuduw.ru/strik?utm_term=how+to+disassemble+dyson+head PDF link annotation
    • http://togurebuk.66ghz.com/83382253640.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/28296890158.pdfIn PDF document text
    • http://goossyy.online/linux_commands_tutorial_with_examplesawvpp.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/Wdghjhi/camera_sling_bag_with_water_bottle_holder.pdfIn PDF document text
    • http://static-start.top/vinamutulevigababozesilun0fb5.pdfIn PDF document text
    • http://ttop-shop.com/how_to_replace_a_square_d_pressure_switch1two9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_60345b6f22ea9.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Higju0D/50210650405.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/69827265391.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/eigic11/99652651903.pdfIn PDF document text
    • http://nashremont.site/enchanting_guide_classic_1-_300zmtma.pdfIn PDF document text
    • http://nowofuguvinidaw.iblogger.org/32272406968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedezaduxi.epizy.com/1994_flair_marvel_cards_price_guide.pdfIn PDF document text
    • http://gugujis.epizy.com/39205746589.pdfIn PDF document text
    • http://tuxefefili.epizy.com/50050419166.pdfIn PDF document text
    • http://veraliw.rf.gd/neburiligexizijeri.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/joker_movie_poster_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 5264 bytes
SHA-256: 99637dd496bc954028bf8774c6da4b25222dd1a2c0447c3e8caaa3fd42b7dbb5
font_01_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 10832 bytes
SHA-256: 59bb6512e2143bdd0d0df07edddf907d1e9b12ba64445a14ef87add5e2ad632d

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