Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae64169f35ddcfc…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 10:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5ea715082fc54d928c154fdd7d8f11f8 SHA-1: ece39697f1e8913ff2f437ff795eabfdbc9ee251 SHA-256: 8ae64169f35ddcfc9d175334bcc1447a7797a531147c0bdeb96fa9aeacc9d64d
154 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, with heuristics indicating embedded JavaScript and multiple external URIs. The presence of a QR code lure and numerous links suggests an attempt to redirect users to malicious content or download further malware. The document body is heavily obfuscated and unreadable, providing no direct textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • 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
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/59018559437.pdf In PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/78353006942.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/direl.pdfIn PDF document text
    • http://laduses.nl/image/file/moronegukadobunir.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/tesaminanabuxowi.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/noxaxalowinedip.pdfIn PDF document text
    • http://slsnn.ru/content/file/pitofubisul.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/kozozizowebamije.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/16322305095.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/59139064095.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/baxijojafikujulekek.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/totafivefoditigutevone.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/47281129288.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/99562401348.pdfIn PDF document text
    • http://net-marketing.hu/images/files/genixedowibe.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/selajufexerenotujota.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/75292338062.pdfIn PDF document text
    • https://motoralbini.it/files/file/48265578714.pdfIn PDF document text
    • http://ztracenaexistence.cz/files/content/file/zusekabekilajidi.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/sijatotivisav.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/pidizifunefiwe.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/saregaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=scan+with+your+phone+cameraPDF 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_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 10800 bytes
SHA-256: 4f779772793d056da4bbe0ba794c817b89da370cd7877b1e81476c3943975ba5
font_02_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 17500 bytes
SHA-256: 86002b02d96dedbbb2d9e5f2b35ce81ab00746c3d27d3bca8b3af1eceae43642

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