Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe3bfe51c96ba56…

MALICIOUS

PDF

100.9 KB Created: 2021-09-04 04:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3af188785a1d5f9714ea68fa590ac242 SHA-1: 692e98c22566ce8e08f6809cf46fb1a1f155cbff SHA-256: abe3bfe51c96ba56dd4c829efff29c7ec16cdf683c989145b6602110b8087071
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to obscure the true destination through multiple redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://partnerplus30.ru/images/fornews/files/56029136065.pdf In PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/bufafagesiserizoni.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/kofikalujakeses.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/35100337003.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/renaturativawin.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1o6q24a9uptro5l5qbhlpu7so2/dimisibipu.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/a12aef7e3013a8880ae7ac00db260d09/37166378615.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/59588b5e76ddcb7d413afaaadf8dc75c/11525409555.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/d17129f3d7c54ed5858fa9dc2c4fe150/48493893820.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/49747111938.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/20479819471.pdfIn PDF document text
    • https://actor-conseil.com/files/file/65996542203.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/17801066368.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ond5un2s1a0po2c26l167255s9/xadusati.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/p8jssqg517vnd93bi4v0apnsk5/86855268481.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/38803361933.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/topajejipuperonak.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/wunojabumanasibavubujez.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/86315187570.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/794cbcf07b2349581f785b4af6641526/wobatinixakowuzisevo.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/nopizewo.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/tivemupizalivedemawed.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e09e0b67fa---80982380026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=manual+kia+picanto+ion+2016PDF 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_off00012049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 10612 bytes
SHA-256: a0178af49e4ddc3a5de5cbf341afe9ac507eb1ebb8481166ae91baf927981370
font_02_sfnt_off000150c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C8 20260 bytes
SHA-256: ac6d53b0805850f6e9168af0bd13469612290c842c3da0ca73ac20fa02beccd4

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