Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64292171e2dd15d…

MALICIOUS

PDF

70.9 KB Created: 2021-09-26 15:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5c5c421192af13dfaf500c0f8b0b6a6a SHA-1: 5743c2a223102f1df203217bca72eed24d741d08 SHA-256: b64292171e2dd15d664c4fb05b674527686f22bd30ae18b42f30947db69ae3eb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm with numerous URLs, many hosted on disposable domains or compromised CMS uploads, designed to redirect users to potentially harmful content. The presence of 'utm_term' parameters suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://pixomot.ru/uplcv?utm_term=pokemon+go+potions+hack PDF link annotation
    • http://say-international.eu/userfiles/file/82121463160.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/tufakedokudatimo.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/vivenomexodigezofaveg.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/penijerulixabip.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/7011243888.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/retenuvadafadopa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5d30740a---58153527718.pdfIn PDF document text
    • http://cold.lt/userfiles/file/bifibatetilamuk.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/22186942913.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/9984181242.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b972224f2---gezukosomadiluma.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/184096771.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/texapipevenonerobanaxijil.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/48306356910.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1aa8410c8105fd2d05abe01ffa35db86/kipadokijomez.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/saxopasaburuja.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xukitudusamesudogumet.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/vobilutetubi.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/43098727419.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/kuloxopumizusoganitevemit.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/kigavigijejuwemefom.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/tuwudo.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/59301794130.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/98779453263.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/selatunoronewub.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/volifuduvif.pdfIn PDF document text
    • 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_off0000b35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB75 10768 bytes
SHA-256: fb125cd30b4c4314c66da97e0537c212973e2835457275c19cde890c972c8924
font_02_sfnt_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 15864 bytes
SHA-256: a127f1b24095c4c183509cc7c1b0a0b7452b153ceb3dc310740c0efd7a0e5bc3

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