Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a0b9391a68780c…

MALICIOUS

PDF

68.0 KB Created: 2021-10-04 02:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f80777229b8bd684e8bebe53d19b9fff SHA-1: 62fe96c07aa013f0dcb9b16583de6c31fff71599 SHA-256: c2a0b9391a68780c13aa9628745cae621584fc26cbd6d1d6cd77be08827a5d9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and presents as an image-only document with an action trigger, typical of a screenshot lure designed to redirect users to external URLs. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of embedded JavaScript and numerous external URIs suggests an attempt to download or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 67 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 http://mariamozharova.ru/uploads/files/gazutedalidirebijuva.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4b712eea714c1d14a98ab2331d98223b/33669943353.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/pakaxujoxawiwina.pdfIn PDF document text
    • https://rainwater.cc/images/uploads/files/mufigakerukesuvagosu.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/95959655974.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/60958253825.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/17920779474.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/sigedugevedif.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/30181952289.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/1721070330.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/gaxinusibumodosutarasi.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/tamogiw.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/galulusepavo.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/18603970310.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/tapewelaruzonizo.pdfIn PDF document text
    • http://minipit.com/data/files/samilikogudedolik.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/72608579032.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/90365665254.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/74896304556.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/51494422603.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/72097209287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mcq+for+polynomials+class+9PDF 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_off0000adb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB1 14448 bytes
SHA-256: d710a4e30dab6ada8f40da62ce755a18fd26c0cb2e54b97767b27104fc03b8dc
font_01_sfnt_off0000d15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 10832 bytes
SHA-256: a4bc543e81af856803dabfb3b7f9626b190010254bdb7721402aa1ed4a73975a