Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7960247d1b11aa9…

MALICIOUS

PDF

76.9 KB Created: 2021-09-18 19:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: dec52f5dfd107097ab83bf6cc02eca6c SHA-1: d1af0819b9b33f7000afb12c4719728640ad3a41 SHA-256: f7960247d1b11aa958bd9661df275fe61d599c6b5a80390f7b862fc1998ca6ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to exploit vulnerabilities or redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is intended to trick users into making a phone call, a common tactic in phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=assassins+creed+para+android+gratis PDF link annotation
    • http://polyacer-ecp.com/userfiles/files/20210909_003753.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/xiwuzujegazazituzulala.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/tadusotonalofegomoro.pdfIn PDF document text
    • http://samtekelektrik.com/files/85402251849.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/69479543423.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613435151358c---lewemivimatukegalux.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/bewolapunudutupigabiza.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/21801809923.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/pibikuxibebalibozabep.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vawusaxasoler.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/digebotuge.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/75102583079.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/siminudenemoj.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/vevitobuxinuw.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/26940449812.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/busojixukibisezagibo.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210916_A6D0ED4EBE796C54.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/52735254974.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/besulenatatazarusi.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/77641807421.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631753979.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/17971206307.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/4765807403.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ab2ccfe14---zetutiwizuvapipilu.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://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_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 10624 bytes
SHA-256: aae2e3d5246749d8892af5eb5f0781dd703bc23bca82d988dad5a2f801141e42
font_01_sfnt_off0000d934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 20284 bytes
SHA-256: 742cdf8978d8154c986f88815e00830b41f5f66708a6a2783ffc1d683df1ad1b

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