Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabff046fd6052bf…

MALICIOUS

PDF

73.7 KB Created: 2021-05-30 22:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e51cf1e9a6743bc9f3857acc58cd477e SHA-1: e925751f5da362729a86a214a3b0afd9a39ff313 SHA-256: fabff046fd6052bfa7bb0e0fd28681ff5c74132c16b3f8202bd69e44c5d46ddb
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing malware or facilitating phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pixomot.ru/uplcv?utm_term=2002+f350+7.3+diesel+owners+manual
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160761fa6df6be---gikuxa.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087193c73e16---fumigiwimadikafavadu.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/5aclvi4f011bkmg7h0fp1uv182/47047946364.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a37151ef81f---dujakox.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c54432fa3---43775835427.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e212db46---vujov.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d20fc36bb---2671337905.pdf
    • http://aftckwt.com/uploads/file/73375616973.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5574529c0349e2cde50cb8d4a84cd6cd/6518147779.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a2586be920f---lolefirirajidejeruro.pdf
    • http://statewideroadservices.com/clients/879378/File/tipul.pdf
    • https://lawina-radom.pl/files/file/jokadisuxenebozago.pdf
    • http://ehomeforeclosure.org/images/file/50541182367.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cff69b224---58735737955.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607933f548e9b---72384673815.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e7f69c89f---xupimufuwawefemaso.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ogc0dt739il9mf20cgei5bd592/pimutijotixitixilikela.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_off0000df20.bin
105762e381c85d1cbd474ab9127158e18b12ae5bfbd3b8c65e58ded588547f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 5724 bytes
font_01_sfnt_off0000f2ae.bin
54c548dae9f6f33fbb7eda7edf0928388dfe05f267fa412f385670238ec0cd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 10936 bytes

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