Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5e4dcc97660b5d…

MALICIOUS

PDF

84.2 KB Created: 2021-08-30 16:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 992ed130cfa9e91e8aba8b4c492e2fa0 SHA-1: a04113e08542878b7503192ad7afe3bca2f6bf3a SHA-256: 2f5e4dcc97660b5d06fd4805bffb5dda058d3368d78b75c0e1d266ba363a1f4d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/251a2beda5784c31ca9644f25db5cf67/28544268571.pdf In PDF document text
    • http://zuestag.ch/userfiles/files/53610596376.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/sgvhct68gkbeshplgaulset6sr/5739827997.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/9425916305.pdfIn PDF document text
    • http://sparkpro.lv/content/file/suvege.pdfIn PDF document text
    • https://iwistw.com/upload/files/84537931533.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/62136649421.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/66c758934fc31dcef24ef92c822be6d8/negexidutodetebodeli.pdfIn PDF document text
    • http://101balkon.ru/upload/files/natujebasonusete.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affd800b0c0---dokegejuxidetiwababavem.pdfIn PDF document text
    • https://chp-travel.ir/data/file/wukimowafibasik.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/46536032702.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d66016020963f08fe4a524903a5c5a54/wivopesatovukud.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/0498e241807c7c4a32202a6cee1508a1/64626740815.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/99578812975.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/82022516898.pdfIn PDF document text
    • http://www.77ice.com/upload/files/44807509268.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/92168293698.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/gozamakixi.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb27bd55d---dapumidunoguwevukeratin.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9798b72784---kuviri.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6d4616723---32142367928.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a9274815---nudabafujosabero.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/v22vti9opvj1qhl0ejo6sb404s/rigawodoliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=poetry+for+kids+onlinePDF 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_off0000e462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 10392 bytes
SHA-256: cea1b177e83ce68a30dec3b4c47acfd87bd728ed1d0c657fcde941b79e765e05
font_02_sfnt_off00011423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11423 18000 bytes
SHA-256: 193e6cf5ba2c456daab166102a94e7db447edbe2023cc7146382d0863b6958f1

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