Malicious PDF — malware analysis report

Static analysis result for SHA-256 465891d5750faeb8…

MALICIOUS

PDF

79.7 KB Created: 2021-08-08 03:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f8e41ebf67208ec83e097fa5d83a453 SHA-1: 691a6c905c2c997fa69bc518f1c041c202cfbab7 SHA-256: 465891d5750faeb8775af7a9b3eabdf50f1601e0f45d56814a01d8daceeee225
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6437

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://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/4f6663ca1172ec36cbf5910629e76e32/jogomesowatifirub.pdf In PDF document text
    • http://uticachemical.com/files/upload/files/81549444727.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/nukimexebe.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/83531051742.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/zosetajala.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084832ba3395---11929301324.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/87573909232.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/72044816173.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/23017178962.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b836a34234e---97927050779.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c02deaf19a5147d268a37794cfa1367a/33425501111.pdfIn PDF document text
    • http://newworldss.com/uploads/file/74119598018.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/80027388727.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/livef.pdfIn PDF document text
    • https://umartravel.com/files/gorimirusumalibekaru.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080f110a0791---xefefupeveniralarekowem.pdfIn PDF document text
    • http://greenld.com/userfiles/56055253996.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/51514222440.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/berezazo.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/67937364690.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/takeginagadukixu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99ef57350---19442454948.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/fd26eb17473f4920ee94c725fad150c0/57883987043.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/pivuzaledanafi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad63de2ff0---vumedewidagekopikut.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/6a0651437cfa16e2c108744e376fa83a/nidapuwujixijizoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+start+the+kenmore+elite+dishwasherPDF link annotation
    • 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_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 10680 bytes
SHA-256: 8f8fce43879be4822169c0dafa501e465054a3965cc25e40202296a96aad41c3
font_01_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1