Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea8b68849b0439…

MALICIOUS

PDF

78.2 KB Created: 2021-08-03 16:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5164c3096b069cb7b2ba80828c3b4dd0 SHA-1: fcf585c25ce3c014bb59d60ab042037d9b004957 SHA-256: 60ea8b68849b0439b7298a11727db0e4966c3c0d9965d09081e01aac0ce7933c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, with numerous URLs pointing to various domains, some of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external sites, potentially for phishing or SEO manipulation, rather than executing a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://teranor.com/ckfinder/userfiles/files/balafanas.pdf In PDF document text
    • https://triosms.com/userfiles/file/kajofitir.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/45b88c4fe7ac1ef8fc8544117775febe/5581287182.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/50402731506.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/bamama.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fufikigufiwubezij.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/84586307728.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/e191fbb0d27da2bdbd8ecaaf843fcc8c/zinezite.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/94160922865.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/16567448730.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5159e2852ec1ad002494598758d30e8e/jisan.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ade3ca6d91---zesimeduzodajug.pdfIn PDF document text
    • http://metapolar.hu/tmp/64171390423.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb77f7f2429---dorapovirojusoxix.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/bonudaka.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/56322528607.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49997d897---76779521635.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756ab547a5a---14979271503.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607899224c22d---renetukezedatu.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/82880585991.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee4ece968d---gewinesunupenonasetos.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/828b559d9892e96108ad93f37345625a/wiremamaligewuj.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/23d94a1e0ad72319521991f66863a05c/49206651893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+an+authorized+representative+formPDF 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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 10936 bytes
SHA-256: a6453a2664f7fb3396a25e8db9651881652ff8f9363aa19d1af09697344093fe
font_01_sfnt_off0000e7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 16504 bytes
SHA-256: b0eac463bf36187f9b1e45b372b2cf685a3b0597c3a461a79119246795858f35
font_02_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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