Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec8ef1b9eb1123a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 20:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 752017789ba8f4ef39faff013b7336e3 SHA-1: d7d63aae5b46f424566e8d80e9eb11a47baa02e5 SHA-256: cec8ef1b9eb1123a78ae63b779b937019a882e5e9c27d3d4e501fe2e7fa54bc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The embedded URLs indicate an attempt to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a9436368f---19870642281.pdf In PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/0376bb6cadfd72fc76c6640450e3a252/76790074367.pdfIn PDF document text
    • http://runo34.ru/attachments/file/71069077853.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/7092e297b23067b69b58af61abd8422e/sesinuzojoperexizovem.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609983744f223---tuvonezulo.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/89240333361.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/97953069159.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c52736696---25262159125.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/16086492661.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34d6c32f48---33330799650.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72990217020.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a2543ad836654ce0d7ab390732aa110c/21843780569.pdfIn PDF document text
    • http://slovoveri.org/userfiles/mobapaleveweparawewodas.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/71980269300.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/kakewiguxuxajezokek.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c08a5ae65---xoxutarafisafisipebudil.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202163552187142.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd4acef902---pifadokab.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/21442279689.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2914a21d5e---zijojodusarigujoma.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3f6fe0f6a7ef8bd22d5b60357dde7c76/gosimudimuzasogaginirik.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/e87ee7719b748564e121556247ad1853/gasezoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ford+ecosport+specifications+pdfPDF 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_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 18848 bytes
SHA-256: cbaba58162ab4803dc6a3ec6089371eb16c06c56dd9b943ee1062fd7eef91a5d
font_01_sfnt_off0001143c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143C 10544 bytes
SHA-256: b5435c025c8a0202f6bda36251eab8e0adc02e853d595576071ce1fdadf348b5
font_02_sfnt_off00012c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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