Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d4156d0a0de7fa…

MALICIOUS

PDF

68.4 KB Created: 2021-09-29 01:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cad96475ad97246e25a9081a18f149df SHA-1: 210492bc30cfa8bca9147b1d719506528a20899e SHA-256: 80d4156d0a0de7fa6c8ad1969772a8ca785f12d498e55f5d0c5af238c624a50b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and is structured as an image-only document with a click-outward action, typical of phishing lures. The document body is heavily obfuscated, but the presence of JavaScript and numerous external URLs suggests it is designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 68 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://coretry.ru/uplcv?utm_term=cara+cit+clash+of+clans PDF link annotation
    • http://electrogalicia.com/electrogalicia/recursos/archivos/35244253208.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109210857557720.pdfIn PDF document text
    • http://asid.rw/userfiles/file/69756368329.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/doxarerevawifuso.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/ragowodexidakexuxesali.pdfIn PDF document text
    • http://dongphat.net/upload/files/furijal.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/zodonitalebib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f42922c73---waxudaxurunax.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/44325265446.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/38381498863.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/38089468264.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/59311117463.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/83657084586.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c96a24ed03ed2b2850f723a1e2f4c55e/tinewizejopuzubokebudesum.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/vavewinesakiri.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/15453770147.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/16005604377.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/75349272353.pdfIn PDF document text
    • http://gojjang.com/uploads/files/soxukixomugujifizukapujoz.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/dukagisunoj.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/kusag.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/86653167248.pdfIn PDF document text
    • http://medicareclinichowrah.net/faboriginelist-braj/userfiles/file/tabesiwunofudimov.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/8420767496.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/demolurovutiwi.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/70546144125.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_off0000b238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB238 10332 bytes
SHA-256: 9fb7c41bb03600c7509b99c2daec2c922aa713550b11b2de3888b494b034a063
font_01_sfnt_off0000c97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 13756 bytes
SHA-256: 324a7228a61cd5dd498fb5ed932445c9d1afc9bbfb1eed00b85e07cf9b986b4c