Malicious PDF — malware analysis report

Static analysis result for SHA-256 f082f069d1b54421…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 05:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff37f562790e2b69c64ea1f1fa956084 SHA-1: 533373ba3c96ed6a609485320af23abd624dba06 SHA-256: f082f069d1b54421255b122794b3fadbb1df1a00f6d1240ffe13ec1cb5b461ec
146 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded links, many pointing to suspicious domains, strongly suggests a phishing or malware distribution attempt. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://silverstonedevelopments.com/ckfinder/userfiles/files/3118640312.pdf
    • http://cheniou.handysociality.com/upload/files/61513784372.pdf
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/40461387176.pdf
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/guvutalurazisulikamatimov.pdf
    • https://accounting789.com/ThImg/file/vimaxalogururajazaj.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9baad00d24e943a75af3968c82dee4f4/xijupiwidezisofupizejor.pdf
    • http://brain-sh.tw/upload/file/zixujuf.pdf
    • http://pelejas.com/IMAGENS/CKFINDER/files/surupomebi.pdf
    • https://mb-classic-service.de/userfiles/file/39016276230.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/faguwigiko.pdf
    • http://noxsun.com/jingkelun/userfiles/files/20210911003453.pdf
    • http://familie-schiecke.de/images/file/76411288135.pdf
    • http://giteduguedesboires.fr/userfiles/file/losajuvaduki.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac876528cd---nowisip.pdf
    • https://szelvedojavitasmiskolc.hu/files/files/robipivi.pdf
    • http://mikllc.mn/uploads/files/77811597260.pdf
    • http://reckdance.pl/userfiles/file/domufefuzot.pdf
    • https://sibservis.com/ckfinder/userfiles/files/wedefupozofigunixememeja.pdf
    • http://wamaeassociates.com/images/uploads/originals/file/wobuninuvenat.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/4279346343.pdf
    • http://www.bufolari.com/public/immagini/file/vilepuwaka.pdf
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73349699245.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+end+of+the+night+2003+full+movie+watch+online+free
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e389.bin
2ec04221688925e1dd11c75198153a31c0efcd504ea58047461dd057b68a0cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 17404 bytes
font_01_sfnt_off0001106e.bin
85cc114a061ebb0691f0b168fa7fe2c91d56d538a69c3cc07e7edac82c85111f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 11384 bytes
font_02_sfnt_off00012afd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFD 16792 bytes

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