Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c42763ca4c29fd…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 13:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5ed067b7b2daa752e49400b358eb4f64 SHA-1: d8ffd334688a25eba112a21c8099c58d7c65b430 SHA-256: b0c42763ca4c29fdfc077d4cd55d83af640e3fbaef3a54122b2687b5e212b575
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to compromised websites or disposable domains, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=barron%27s+toefl+ibt+16th+edition+pdf PDF link annotation
    • http://tehla.eu/userfiles/file/40737631397.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4536d70671---ginugatur.pdfIn PDF document text
    • http://wwstationery.com/files/file/17884846681.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4jv8nn01fpuuhsl05h68je4tk7/24302144203.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/dafinofadedarojavitinod.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/79om44uvfka5or6i9u13imikel/8056920911.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/947ba0d9442e1eff381cdbb8baa5d78b/80665473191.pdfIn PDF document text
    • https://t2sc.me/userfiles/41863242481.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/90792b3188dcb261538e7f626480302f/4517249649.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/82219496573.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607de103e3947---74805363500.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74ca7b2fe---28478416053.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/punatikasonebabaxu.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/vizujisofelabupe.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/65343399103.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/36278045253.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/d43gv11fod28eam5frfkn6u1rs/4656477264.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/18892525017.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57c5d34ee3---ribimum.pdfIn PDF document text
    • http://goref.ru/files/file/83642908357.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/c003f4daa33b6c5bb3c6adf11e80734c/buburesiroba.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/11102304244.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/72arm3897tinjr88aqn13q8c0f/xokenefonisopupomexidire.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_off0000c759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC759 18032 bytes
SHA-256: e01e50d4857dc1c26b4661c956207ae7b4ee7b7d4aa118c48ae968a02d8361ea
font_01_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 11044 bytes
SHA-256: ee523cc6851fb8540b6622a7f5559e198bcc92400cb83506725baaf43eebd1a0
font_02_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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