Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32c035052d206d4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 02:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: beeb16c735b63bba7330926418f6a0ce SHA-1: e056175451abff5840c75a6521481421cf2227fc SHA-256: e32c035052d206d4462d580e1c09d914647ef646969843f707ee08fc54499303
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into clicking malicious links. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cructi.ru/uplcv?utm_term=the+meaning+of+fore PDF link annotation
    • http://jadever.vn/Images_upload/files/kemewebixejetadivegi.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/aoiqt5basbddske4vn1hn6vfmu/wubuwesafibemumedijuje.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/28e6162f0bdb63eb80d1a6816c652cdd/tumigajegikobekojejobupo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161125bc108305---sefubavotoralifofez.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/lovudefixerutitedo.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096041a92f6c---84085916997.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26a95a90a9---9980043475.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16106196de3b7f---68370103074.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/612add6567c8925ef3153c99150cf9e6/75070445625.pdfIn PDF document text
    • http://licausi.it/userfiles/files/vaxazotetokeg.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/alb1rg90tc5pokfg9qb37911ko/novurejepag.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/96958266953.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///72647500019.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/59884492980.pdfIn PDF document text
    • https://beaszemin.com/files/11601075931.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609849d7c6530---66458247279.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109010220507995.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ee318830bf429dcf55de3a53ccf5d1a3/jitafa.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca12868cfe---60914116392.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609096e60124e---pabexufare.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/2sobmhmdsme6pgo4r3jnu3v45r/fofotanawejafarulakajobeb.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/domuwutavenijerinegin.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_off0000ced0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 18808 bytes
SHA-256: e42341b49f694db14cf533574599265b98ccb7e8d808e646dc4c5e08fa0185f4
font_02_sfnt_off00011869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 10312 bytes
SHA-256: bc04f1ee0bd397e7db8b152a4566cc86e882d825438b2da908b7e7d504e7acb1

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