Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99e349e834c0db4…

MALICIOUS

PDF

89.0 KB Created: 2021-06-09 16:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81b78079c2defd60344b704625d5de77 SHA-1: 2ab15e668cd303e2068a54e31512bfcb8464bb60 SHA-256: d99e349e834c0db4cafdf469ddd39d038fb09406a716e55b67362b46bcb9a7b3
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, likely a phishing lure disguised as a resume download. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious payloads. The presence of external URIs and link farms on disposable hosting further supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://chcial.ru/uplcv?utm_term=student+resume+format+pdf+download
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b947b50dbda---76548481392.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/1715e67d14a3bde45fac916c1164e772/sisesurirotata.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210508015153.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/51qe6ldqh1cmsijc53cjkhhe7s/tugunavugowagatikunugoxi.pdf
    • http://gemculture.com/userfiles/file/6775937525.pdf
    • https://ecoretras.com/file/tefipob.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160944988699ac---vinuk.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b67611e664---53528617969.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089471624c8a---43780406480.pdf
    • http://gtshotel.it/images/file/jijitigeretanupov.pdf
    • https://paklya.su/design/img/upload/file/8614187240.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609508f80bed9---mabexiboj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011edf.bin
b6a8924b49e507894caec61599915a65060de5f34c55f375271cd98d8bf4e311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDF 5380 bytes
font_01_sfnt_off00013124.bin
c040132a6cb251804590e6d0ed632041fec99e4324796f81fc0c09a699b3795f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13124 11224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.