Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1723fc3c3718cd3…

MALICIOUS

PDF

88.1 KB Created: 2021-03-04 18:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec5824f4667cfc80b84823cd1294a905 SHA-1: 2b31fd6a87b00d97de1a04014a0473015799806c SHA-256: b1723fc3c3718cd3e7c21d7a6c6e6164646ac61ea78f8d3da3ba18c12f2a4c7b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs and the nature of the link farm suggest the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://xajibur.ru/strik?utm_term=what+does+pe+error+mean+on+lg+washing+machine PDF link annotation
    • https://midigoxu.weebly.com/uploads/1/3/4/0/134000126/larudixejane.pdfIn PDF document text
    • https://rijadotijijani.weebly.com/uploads/1/3/4/4/134470018/nedowazovebopalobiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/6o2SgjD/5982106402.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/15797386564.pdfIn PDF document text
    • https://bupowuxa.weebly.com/uploads/1/3/5/3/135317106/2562406.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/ahgKSSV/xitusazenabixilejapuku.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/3605478184.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/aviation_weather_services_ac_00-45h_change_2.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/4022807.pdfIn PDF document text
    • https://lolejubabam.weebly.com/uploads/1/3/1/3/131379737/vosuwovazodu.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/luxelula/50_shades_of_grey_movie_google_docs.pdfIn PDF document text
    • http://zamutodud.rf.gd/usps_account_number_format.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/wosafatipoz.pdfIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_e5f31cf274f24d12aebeed8ef0d17f90.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_0d4ea4b6f6fc47a58f66a4d0b1b73f3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/atm_full_form_any_time_money.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/ms_access_2007_tutorial_download_free.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_986a65a780814268b0860790da46a47e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/bewildered_adjective_form.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_4977e1be8bcd44d4b97779ac930fa6b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/80885834845.pdfIn PDF document text
    • http://navibav.epizy.com/how_to_use_walking_foot_bernina.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_3ba93796b78c4343a6bb024dd2a29b62.pdf?index=trueIn PDF document text
    • http://pasifowon.atwebpages.com/the_witcher_3_ps4_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 5592 bytes
SHA-256: d58ed2af5be7d0cef9756dab0a3ce94240d48f56258a5ec03156edf457ef6d80
font_01_sfnt_off00011806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 10820 bytes
SHA-256: 85e5d995868f49f3924f915a8b1ca6cd61a68cca0f2328c53ea544d976523d67
font_02_sfnt_off00013d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D08 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04

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