Malicious PDF — malware analysis report

Static analysis result for SHA-256 a206d9bbf8b4f5b7…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 19:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 826107a22d66c7ff80909aafe2949a10 SHA-1: c466c02850fc66c289b8435df40bed8aee75b2f6 SHA-256: a206d9bbf8b4f5b7e477ead04062f583d62fad6fdec76d6a38b7e6c5010235c9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://asi-filter.pl/files/file/36134527683.pdf In PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085536127cc0---miroxikerumifozugu.pdfIn PDF document text
    • http://93564497.com/userfiles/2923088198.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/nawotonewevonapurop.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/bokusufesetaxuduxema.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1311b849---82086178295.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/57731852928.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f12105b170---7663699367.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/14550735084.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/57007432493.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/24578651151.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ee783521---90910322763.pdfIn PDF document text
    • http://blackshirts1960.com/clients/876325/File/18722088807.pdfIn PDF document text
    • http://954move.com/clients/4890/File/dufukakobivatoruruver.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/dt1cbmak7sdbhecuff4j2rf8j6/78859615138.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080c95c93ce4---1147454585.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/tefunefigol.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/55cb2dea230b44ad07279412fb0e8fea/xodidakitulimeludufojal.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/71390906995.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/84938244711.pdfIn PDF document text
    • http://fteq.ru/files/file/nepejawakokoxod.pdfIn PDF document text
    • https://ever-progress.com/upload/files/37929779825.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/3167e27bab31c0c082c5bce50a64b083/tojinog.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085873a32174---momegeburugatokapizaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=si+pudieras+verme+ahora+pdf+descargar+gratisPDF 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_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 11156 bytes
SHA-256: 5075c9722c76dd630665f60f097b55709f08f3365e8fe2d54d73111557d8eabe
font_01_sfnt_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 20284 bytes
SHA-256: 39daea646c9e2837f32e60b51939f32e3e3359c708818bc6a9d552fbcabeb25b
font_02_sfnt_off00012069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1