Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2b842c90430fcb…

MALICIOUS

PDF

76.1 KB Created: 2021-07-03 08:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 327296c36b93743c5ff4e75c759074d7 SHA-1: 20405fa6a3e4c610cc64cf5b2d4383c9f477bada SHA-256: 2a2b842c90430fcbd826e18f1e72bc910cdf76867e52866b934307524c230e5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608792f923291---46197911587.pdf In PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/wesezif.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5571230dcb---tagaboz.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/89852164.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/83882355807.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/qsermc0a8uij0ujva2cd0n4ni7/48133156929.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9687583702190123bae8c48e1f212e30/76493512569.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09f5dc8a5---87917672061.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5724cbd07f---4826448187.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/zotedivab.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/74499111616.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b46960dd1aa---pusefidovukowulenibidam.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/jupobitotax.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a7cacd2dc---90840339248.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/61813576475.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088cfd880f79---lufurijapal.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/9124aa2faea5061335d801fa7c706265/bilevagopokefedo.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/pefekasalot.pdfIn PDF document text
    • http://www.emailposte.com/pictures/tajiwemam.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f5c8c71b110ef465d3e10915aead7381/27839148796.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92fb9694a6---rezimirasakod.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/tonerufiso.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e9931476c---sezexonabonekevemi.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a88322c3c---29459084077.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/fidefururukemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=array+indexing+rPDF 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_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 10188 bytes
SHA-256: 1b7aefb83d8d25edb4a9fc349bcae2ae84259f6817d865e0938e554ac826b6d6
font_01_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 16516 bytes
SHA-256: c41071151861068ea60d888ef7cd8276b0165b014f278011203f25386c27a184