Malicious PDF — malware analysis report

Static analysis result for SHA-256 0193f1a4b95a82e8…

MALICIOUS

PDF

87.3 KB Created: 2021-07-06 22:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cf4b7e3d2e949cb1eb4f228a050f70d9 SHA-1: 46a740f6f68fac27c240cb9749a93341310f2d06 SHA-256: 0193f1a4b95a82e88c4ecead80c7274723383a70c9d6b7cb36a8ab5ec8108f3d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://europartner2.pl/uploads/tinoxijujujir.pdf In PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/lch0m1fgm9be8ei9k6sfghshg3/botedirig.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/fepidexalesonaxutelad.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160726bba1d91a---12539740423.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/bd126dc6e416233edb7a7bcc7d1dbba8/17553419336.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc47494a2---vopokigemowasajig.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1f25c7ed8369408491f64a1eab343a58/36600612570.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160872c3f4ae7e---14872674415.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9ba8ea22144927258b1380a917449f83/16567047512.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/85aeca5fe09f8af0abd5b18784bc807e/53380811272.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7d0ee6a26de8d1747d49b6cd01d186e3/62446905497.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3cd8dbfaff999b72783b54ad4639152c/8718736190.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/gofisod.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/7193239651.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/uvngto8c7jmi642g34oka27muu/fezusa.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaa34545b1---1837006386.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/56796767327.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/miwalubibowumosidisut.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/45ded92d16fb44e83cb25a15ac6c6f44/72279198465.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608425e7380a9---67453407800.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/73274622622.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/woxujewu.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/67a52cc15cc12e933e07d6e885211932/walegigip.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f9bfad009---92257870699.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b0e28aea8---93896480485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=your+company+purchased+a+12+month+insurance+policy+for+36000+in+januaryPDF 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_off0000ef28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 11848 bytes
SHA-256: 0fdf98d6c54b8834a6532571e79ef180f17adcfdc000400585abd6fc29b2cc94
font_01_sfnt_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 16840 bytes
SHA-256: 9d59dcd0c3274bf853aa8cb1c63c2988209353d73180de73ac038025f20987b0
font_02_sfnt_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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