Malicious PDF — malware analysis report

Static analysis result for SHA-256 509d57256f26e3c4…

MALICIOUS

PDF

86.3 KB Created: 2021-02-07 00:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0133b2584bc598aaa052d5b57c7b63a0 SHA-1: 4398ab075ba8dd98d994308396876ff7027fb245 SHA-256: 509d57256f26e3c43a157beceb15f1083336dd3e5bd8da1b4af144796bccd878
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://jottigo.ru/wb?keyword=grow%20model%20of%20coaching%20template PDF link annotation
    • http://4escam-bot.online/luxury_islamic_broadcast_package_freeh6ys7.pdfIn PDF document text
    • http://fitokaps.xyz/843584025268tgdg.pdfIn PDF document text
    • http://tryraisins.pro/android_facebook_login_app_not_setup4ph7z.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/18d5bc3e.pdfIn PDF document text
    • https://sagajogesef.weebly.com/uploads/1/3/5/3/135398815/6740472.pdfIn PDF document text
    • http://theboldpantsproject.com/5127601915a4rkt.pdfIn PDF document text
    • http://duzatizej.iblogger.org/12466935429.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/peluloviru.pdfIn PDF document text
    • http://tovelksa.website/calculator_app_javabav72.pdfIn PDF document text
    • http://rezefad.22web.org/19481828519.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/jofoxedezivix.pdfIn PDF document text
    • http://maewallace.com/gutenefolekibefapediritedc9g.pdfIn PDF document text
    • http://mpvideo.org/dihybrid_test_crossa8do1.pdfIn PDF document text
    • http://lifeshop.pro/233996160322m04j.pdfIn PDF document text
    • http://energierecrute-emplois.com/night_sky_wallpaper_for_androidgud74.pdfIn PDF document text
    • http://reduslimitaly.website/9801029854k7tqc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebanibaru.epizy.com/19312093487.pdfIn PDF document text
    • http://tozuduxaxikagik.rf.gd/fikakanowakafavepotir.pdfIn PDF document text
    • http://gegenig.epizy.com/charlie_s_angels_2_tamil_dubbed_movie.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_off00011324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 5512 bytes
SHA-256: 7179fbf8cba406767700d137b0696319a9098269baf3c3575f65be326b32d4a3
font_01_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 11296 bytes
SHA-256: 76d99b61fc18d44fec660d9123371495f81bceb1dcda496974c02e7df9b2e1f4

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