Malicious PDF — malware analysis report

Static analysis result for SHA-256 73006fbc212502e8…

MALICIOUS

PDF

90.0 KB Created: 2021-05-19 11:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4a6165e2a8e7013bb6d405323693a8c3 SHA-1: e79d1a9bf1aab3105db25a3662a6119ce115eb50 SHA-256: 73006fbc212502e838e0ad68ea4f6ca6b42d1ba17e0185cb593f0654fa5fd02e
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains, likely to distribute further malicious content. The embedded URLs and the document's structure suggest an attempt to trick users into downloading malicious files disguised as legitimate PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=veronika+decide+morir+pdf+descargar+completo PDF link annotation
    • https://aduanaldelvalle.com/userfiles/file/jojonaliwalidisuxowobis.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/10596891308.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/butevuwonut.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/44546521727.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8981a3bee---bexinilerowusibadowatage.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f26547c0c64a49107a253305c55b8f5c/rakavosakikovok.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beccd6127e---waxobidovi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad698fd6c---zemebifumipazuwegukusobal.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/godinosugirinot.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c62e2b51b---49725318853.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/fd5b8fad629a451ebfbd6cbd59a1391d/3441375997.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07eee293b---55223905238.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d70d29618e---virefisakivozogivonemekaj.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/gurak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A91 5632 bytes
SHA-256: f107a53e962eca5a1adc1fb530871d41cf5234facd0322aba7326258b8f5e4e9
font_01_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 5504 bytes
SHA-256: 9cf2fcba7981290af5406d071a273a4c3df8f695ee17ddbe9be99b9ccba6cadb
font_02_sfnt_off000130fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FA 12552 bytes
SHA-256: 6e2da2ac472ff2315784618ca3586a0538197ab429945474b6c6f02ed7cfac67

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