Malicious PDF — malware analysis report

Static analysis result for SHA-256 24295d57b331d27b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-06 00:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9d795ec4d3b25ad244928bdaa6d29732 SHA-1: 1f11f946360e2b20986409318bea16d1dee0485b SHA-256: 24295d57b331d27b7e363bf6342ab802e646bdfbd86e895d1acc7ad14e6e48d1
204 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and ML classifiers, and exhibits characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to bypass gateway security. Embedded JavaScript and numerous external URLs, including those hosted on compromised CMS platforms, suggest an attempt to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://irlanc.ru/uplcv?utm_term=transponder+chip+catalogue+pdf PDF link annotation
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/bipenujolozotem.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/zumuzimovowemow.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/67660376984.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/7510221474.pdfIn PDF document text
    • http://klinok-saintp.ru/files/82396478197.pdfIn PDF document text
    • http://vucert.vn/uploads/files/57738776405.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c175bed336c---55210442663.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/zimanune.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/81849894239.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c7ab166ed---gutuxepomawaf.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cce3c6446---xexivuv.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8299e4c2450e59b1454c9e3e8747bd5f/kudekol.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/54755716261.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/nasojesarinulitizaken.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/93656778307.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c74f2d91e---93451487928.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/jesunefofazot.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/4974807820.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/64406401028.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/mikodabozi.pdfIn PDF document text
    • https://optical-axis.com/uploads//files/202108090644384554.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/wenonunut.pdfIn PDF document text
    • http://twilaw.com/files/files/70998609908.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_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 10960 bytes
SHA-256: e0f378e0bb79cf6f78fbcb3aed260ac2bef5730bf575c968689554890fde2fac
font_01_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 18032 bytes
SHA-256: f6f18042166788d84c2364ca40afe6d60db14f22aa7e9ef90ef7b84a6f350efd

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