Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f70f582bafee89c…

MALICIOUS

PDF

71.8 KB Created: 2021-09-05 05:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42b810806948ff55fecd1465c8196928 SHA-1: 89d55759d1b25c834ed372908b820512bccacba3 SHA-256: 2f70f582bafee89ccf0edbf813b4ebb4d4c805b4b9885202a97003ab5cbc1a4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://queure.ru/uplcv?utm_term=graphing+linear+and+quadratic+inequalities+worksheet PDF link annotation
    • https://office-agglo-larochelle.fr/userfiles/file/wijozowuxadilulosekokujog.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cfd94da65---18347867041.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/dc64bcd0159e753b93e90eb83c647469/806617642.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/vc3hkfrl3j9g3tjrm70k3cp846/64755662395.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/68416790517.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f260708622---94331832269.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/12361769281.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/jebubugaj.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/28341480202.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cc6659faf9eea11bbb3a35525b805a78/kesugerisusetaranelef.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/42126944087.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/togujem.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d7aa92146d5bbb82110f220d415d1fd7/banipokapodimawojanawiw.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/xorobutenovuxaxexini.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c49581490---17406799699.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8720615a286e40685c4bb415c8085b9c/30568704663.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/rerirowekalojigu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/kodulositegumusonewota.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a487ebb7---9062001818.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/pebodixinugaj.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/38550369147.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/99473390511.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/82635058645.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_off0000b721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 15764 bytes
SHA-256: 50f07271fd43a30fa6d264a025f3d25cfdd24614af743b3a08f64cc88aa1cea8
font_02_sfnt_off0000f786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF786 11256 bytes
SHA-256: bc8a24e8fbf90883ff611f01d166570772e974e1b6c52b6e32ee5cac6ed502ea

Open this report in the interactive analyzer, or submit your own file for analysis.