Malicious PDF — malware analysis report

Static analysis result for SHA-256 47090dfd876c40d4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 09:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9abaf00d77518b45529b2edb193e5b8a SHA-1: 1f2cf376a47bae571c5f99e28f225d4cd94b0e5f SHA-256: 47090dfd876c40d4faf0b4aee82de1b29ee5ab66c845cc935b52e5ea60e69239
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://mimpiindah168.com/contents//files/96465512399.pdf In PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8da04215---mimubazirovilepil.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/14934018653.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109d0e2da6ad---97368933180.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/24846379273.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/62285818106.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b814fc8598d---56506770493.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/nanolep.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/sepunefifade.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/51056510161.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872b7c7a4ad---79140588007.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/mobemi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/cuh8vu3aakofomum64v0upsj1q/17525544697.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b9666d1b3---61832728787.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6491cef8a370010f154b4550cb3f7820/80109858144.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/9437472573.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/ribizisinekake.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e786715a4a---xuletusemom.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/degimed.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6247950a---9792778127.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/xilemomasibujijugutapozo.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/93149644161.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/14071623097.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/30055825520.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b8688eb977ebd53ea52b76532b1f7aac/389554543.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/bhog1a8pkae39fchh93ti2s9ar/jijepexiniboju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=work+in+silence+let+success+make+the+noisePDF 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_off0000d252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD252 10680 bytes
SHA-256: bf6b1a02a2195b379e80f4df6c9310aae30ad7b7f1b8bf3703af031705837aca
font_01_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 17820 bytes
SHA-256: e3b383f9d3856a4a7bc5cd4780047deaf4290cbf4cde3a7c67b6ceb294181923
font_02_sfnt_off000118e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1