Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80ce9a1b7a1b39d…

MALICIOUS

PDF

86.3 KB Created: 2021-07-23 05:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fee9c8e223345451247fa3a93e990469 SHA-1: 2ea02ffff6e782ba8f6bb3b5c833beabebe62fca SHA-256: d80ce9a1b7a1b39d8947ea014a6ff96f3b88570e62cdf85233ec55d340692495
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb3eaec88b---jupomifodurutojezi.pdf In PDF document text
    • https://toppelletmachine.com/d/files/ruxugofodepatil.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/xosowalexuzipebojug.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105262149.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/muzogojag.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/dajaxonabadugawulomiwagu.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/16761695400.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/zolonozijaxad.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/vazosimejaxitolabizoz.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d983ade49d1---15444206295.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/70279489579.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160962ad99d8b4---buwopuxir.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0ab78c544922f994ccb8ea3255b61041/17370571655.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/vegogulefugagikuwejep.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb8a77a47---rekipi.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/88640308526.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/dopaxuroze.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/vuxikekejitazusuxirumu.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9da0cb77f---47645831129.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/wivojixure.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/dexipiramive.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160913f590117b---31972524866.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/pq28jfgl2rvet52142n71b1o27/48152089961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=green+glass+game+play+storePDF 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_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 17344 bytes
SHA-256: c08131dd9b8bfb35cc6c6752fa17ce10df57374bd6d0b171c70147546dcefe41
font_01_sfnt_off00011ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA4 10656 bytes
SHA-256: 0c41b9a9c77c01f649ad9e289172e763d1872d7b0abfb75495a3efc434c04ba8
font_02_sfnt_off0001341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1