Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05a2ccf795f5880…

MALICIOUS

PDF

85.8 KB Created: 2021-08-29 05:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3bb24e9177e2830f1eda67df2b6d30b5 SHA-1: 6c6cf7684066db27cb2ea010c55a93ba69df0f5c SHA-256: d05a2ccf795f5880a094090d5de640b69b61366fc6726ab4b3c937690223af6a
156 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 ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of external URIs and compromised upload links points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://garglob.ru/uplcv?utm_term=final+exams+answers PDF link annotation
    • http://tungalag.mn/userfiles/files/38002840693.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/51591761160.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/muvuvugaxebozinekizovuz.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/zajos.pdfIn PDF document text
    • http://geotersrl.it/file/dojelevobopedapuzodiwivu.pdfIn PDF document text
    • http://healthywithhart.com/res/file/79908770323.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/buguseruwariz.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962a9395a82---20523165987.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fc1b4c030acea6fcf6c43469c6e40550/lixoramitusesubaregajazat.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/rerasuzagavabezomakep.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607306220db0f---sogudafonefemujomitisijox.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/59841581072.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/bpsegd8k53ovjp0eku1g00db5s/86661528801.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070abcc2ea1e---54256250783.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/ruvuzibusu.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/xotebeto.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/64188088417.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/096a4b3c81c950917128d17c7044dc02/23979692710.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/63581455799.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f90a66981fc---87984924146.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3d7866d4d---wizatugoxuduzatelutu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/46237b1041f9753c674fdf850ae360a3/fudiduvexetipubov.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/21828630926.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/goruxupulerileluwijegasox.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/aomovc6u7o81ftqrp5opipuk32/65011766058.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a75568193e3---56796460797.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_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 18088 bytes
SHA-256: 4b2b7f265736b42bd17f3414641657b0a3d245192f595ba6acb7929607d43854
font_01_sfnt_off00011a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 10216 bytes
SHA-256: b149e0e5ba3ae9c3105f29abac55091295112156ee773fde9fb7fa59115543a0
font_02_sfnt_off00013133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1