Malicious PDF — malware analysis report

Static analysis result for SHA-256 a448502eb020b7be…

MALICIOUS

PDF

61.1 KB Created: 2021-06-20 03:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f6d87c0f91fe4d050506199d01f70ee5 SHA-1: e5a450c4ee05f225564909ed46e16b8ea125ac93 SHA-256: a448502eb020b7be374cebf26d47e83546da3b830a3570385d4d0586fbe52710
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm designed to redirect users to download sites, with several links pointing to compromised WordPress upload directories. The presence of 'utm_term' parameters suggests a phishing or spam campaign aimed at distributing potentially unwanted or malicious applications, such as the 'pokemon monster carnival apk download' mentioned in the document body. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7635

Heuristics 5

  • 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
  • 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=pokemon+monster+carnival+apk+download PDF link annotation
    • http://dzbnf.com/upload/file/%5C/wosumenafokipojibiz.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/loqbhllrlpfjqdrp2f220v5uch/maxoselel.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0862ce8059---91437993593.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/28ac069e768f9ed9c164be3aed6b6562/20901080025.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f009ae66fd4a840dae8c861999bcf589/xalogemojebiku.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b95829d1844---gavezaxad.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0ea37fc9c---wabinepiguwakumifato.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/7rf1jake4i679602qnvmrn68v5/40750128192.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1c09f7ddfb46c837a894690378ad28d8/45088621629.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e645f81d5b28f09d6533a831c3ab73a3/16812928254.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/efa5d5a375e3b295b6d10c386924c676/paxukiwot.pdfIn PDF document text
    • https://papiratisk.cz/soubory/89074939183.pdfIn PDF document text
    • https://anfauglir.com/images/file/99107051149.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a4215c2c---6542711870.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/jefopesekuzonanaso.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830f20dc88d---44479320291.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/poxebitefevofa.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/61faf49e3e1ffc4657a7da790bf48061/37231715262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B3 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off0000cff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF0 5436 bytes
SHA-256: 975c99e11aa05e8a67b92204adec14009784d28a21542fae1cb3564ecb1b5ee5

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