Malicious PDF — malware analysis report

Static analysis result for SHA-256 f297032aaa60041c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-12 03:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f93342679049c5fedb0c29aa29ed88ac SHA-1: 3b363f3645c65326bacbb51034a7ff6ee9317e1e SHA-256: f297032aaa60041c5c2e10a31c8afb6be34382dac734a1483bb3087268357a85
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it is a link farm on disposable domains. The document body is unreadable, but the presence of numerous embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or scam attempt. No scripts were extracted, but the PDF structure itself likely facilitates the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/wabojapizokejufed.pdf In PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/diremitevedegu.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/zekotadusujisu.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/22507313473.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/42e1sko2k5j0s6lf1e3bjj0ueo/80836974202.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/23310582828.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/kuradunesolevetakoxed.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/goles.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/52297121756.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/44052fef9299d4b579982e971194fc7b/sabawowifuveto.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/72503616058.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/59951209362.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/2864612399.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/jakiwozilevimo.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/79605997901.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210906125958.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/lujasumeragumag.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/43872971341.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/bewekematunosok.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/50182303860.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/kufukixejixodan.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/90998659338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=zxing+read+qr+codePDF link annotation
    • 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://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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 18080 bytes
SHA-256: cbc6aa1223e2d46dac2a783dd81fe45731ad6cb6847e6f1379c8a96cf9a50bca
font_02_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 10444 bytes
SHA-256: ca9d73407e3959a1e01015026cacb89f7ad907a2f21b330327ec1005369caa97

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