Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df64b1872cde74f…

MALICIOUS

PDF

62.3 KB Created: 2021-09-21 05:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 76f142bbcea81fb6174711bbb623b77a SHA-1: f6b5983d52503e34158d6f0f0933b812a8fc7d10 SHA-256: 6df64b1872cde74f2d45eeb8b9d28a99ceffd61bd413264709a5cb49f435ef31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple compromised upload links strongly suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=instagram+password+finder+no+verification PDF link annotation
    • https://websbag.com/uploads/files/bifad.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6d75758c---17287338132.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/dusufabavagudob.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/xudenupetejusidivubisuz.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/jabadetavunobaw.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/gulopijorogidaz.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/40941414169.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/solejesixebak.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210902092128.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/21802564900.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/wetegogajetej.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/zufozosavodevasotiw.pdfIn PDF document text
    • https://hirurgija.me/files/xunifolawipelewak.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/3527447044.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/jugewuzajeked.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161442bb4e7603---magidejivumigisulofuk.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16134416245fd3---litudu.pdfIn PDF document text
    • http://printific.com/images/contentimages/files/tinute.pdfIn PDF document text
    • http://debten.net/UserFiles/File/dikedo.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/wobugop.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/befidupi.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/firawodotamajuwilebepuxoj.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/78615937271.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33636005094.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16144c19042583---gijutagozebagenotavadotuv.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 11020 bytes
SHA-256: 337def3961bd54adc1de6ff426b58ffd808c6e822ce738387964525f3b122cab

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