Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe7da7d680c8940…

MALICIOUS

PDF

89.6 KB Created: 2021-08-13 12:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 08f9f07eda1cc2aa99dd9ca3fe1c5b24 SHA-1: 9fac39052e63e60e3f69e517798de2e72efe3ffc SHA-256: abe7da7d680c8940d68e72ddb8067ba351f4fdcc50ca9cff749aff2578b326e8
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains. These links likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aucoindeshalles.com/menu/file/luligizegosi.pdf In PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/2ba2baf2ac485f765e3ed59fa64148b3/nejogopasi.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9b497c014897c3b1cc2772cd6e99554d/51128118932.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070180e06799---fovap.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/vutobarefumaxa.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/76vvu8en1lhr9ub3ke0mc4nnq6/wadegufozumaxejebi.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/vunamoligupawodimugereg.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/laxapebafugavomet.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/g8gbcr2mbuth2a4scuh4afkhf6/15856159144.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/telojadovet.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/dasisuxowukepogagozasorix.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607863caa9bf3---nolorabikubozed.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/mupuxuvivizapurasug.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/062024002e7796a3a0c72b1c3a52f9f0/94086973795.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/76144086934.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/28742385611.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/86182862194.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/e18d0687c98e6c7e67b3e7d5c9653b54/35912308414.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a45791059d3---71603671672.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/kozuzodapatumaxigam.pdfIn PDF document text
    • https://masukpt2.com/contents//files/899513161.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/pusijisodozimag.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a6a98f0310579c88913fef332fb6669e/petijozaxaroratesufotedap.pdfIn PDF document text
    • https://baongochoa.com/upload/file/9764448257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=using+%C3%A9l+in+spanishPDF 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_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 10244 bytes
SHA-256: 063e07ad0a15aeb3635d3f96a6b50433d14706f548b5bc500adae5e460334df5
font_01_sfnt_off00010e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 19028 bytes
SHA-256: 33183004d92a73e877e6141141156b3241da962fecf7110c37ff981668c2e47e
font_02_sfnt_off00013f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1