Malicious PDF — malware analysis report

Static analysis result for SHA-256 a484fd5aeaa5157a…

MALICIOUS

PDF

65.3 KB Created: 2021-06-18 01:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1e205a347b2dd25a7484d0b85eb2d94a SHA-1: e36354cfa7ba44b47bacb3477421dc385a305739 SHA-256: a484fd5aeaa5157af7fa82df6a41becc477f59f30c8c50ec08e50328a759a4b7
162 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The document also features a link farm with numerous URLs pointing to compromised WordPress sites and other external domains, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=psychology+books+in+bengali+version+pdf PDF link annotation
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb73b18cd---taxokenagifowiwujig.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940859eaef5---51132748498.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/062bebb69be8975832c64838dffc1351/13307726229.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e391ca1656---dizew.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b70cab95b---viwiburapig.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3c0e2409---52752491311.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073433077fab---35536855282.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6tbv11dds9tl5ua5n14t0etrv0/15730245128.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/92128348238.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16098be019216c---34930993585.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c1e28b98e5c5d7e4145d813c227519c0/fikifivelowufa.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210608_114214.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af98466ec5b---fetijotakojisumuv.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/koferozimodawon.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2e187e979---wamoganixomu.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/tiwuwonivasuweke.pdfIn PDF document text
    • http://zuche0551.com/upload/file/56878239999.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/3462003850.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5784 bytes
SHA-256: dc4b7b4d646edd1b40d7bfd246089e6e40223bb1aa9b26957a00a2abe03af2a2

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