Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0d089d30a6e840…

MALICIOUS

PDF

69.1 KB Created: 2021-09-27 15:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bdb5383f3e63238f9fbafc8f0d02b4bc SHA-1: 9a37138cf2a59a23f618e65ed80e9aa273768362 SHA-256: 3f0d089d30a6e8401ccb014613c28fec0df0b5daf0ea8152eb9d0c371415d857
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a phishing lure due to its small size and image-heavy content, typical of a screenshot-based attack. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a phishing campaign or a distribution point for further malicious content. The ML classifier and ClamAV detection further corroborate its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://philabc.ru/uplcv?utm_term=jumanji+the+next+level+streaming+gratis PDF link annotation
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/juraz.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/64109267965.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/85177759678.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/e92f667a2d71c29fb29526d1c22b0b30/17130032317.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/88615924348.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/zetowegitof.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/xumiwuv.pdfIn PDF document text
    • https://ambalatender.com/upload/files/84706821248.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/67935281880.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/nadira.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/rozutipebifajised.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/56160233728.pdfIn PDF document text
    • http://furniture83.com/upload/files/damegeruduwif.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/74440636930.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/muzikokobixu.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/kubixolibajedekeriwitobog.pdfIn PDF document text
    • https://camphacement.vn/upload/files/monutolizusavo.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/leziwumawugarekisam.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/severejesos.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/18411750278.pdfIn PDF document text
    • https://stormester.no/files/file/javimobadofevefuzuka.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/lewajezezabakam.pdfIn PDF document text
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/damodivug.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_off0000b07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07C 10824 bytes
SHA-256: b3d446902c75b3c5d1e64b5c025094cdc1efdb60b5857eb6f4a43abc5d5905f8
font_01_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 14072 bytes
SHA-256: 1aefdfe712d16dad72380c0cabbf5cc3485677638e11ae7ad6a9df78679aa7ca
font_02_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1