Malicious PDF — malware analysis report

Static analysis result for SHA-256 911fd98fb887ccd0…

MALICIOUS

PDF

69.9 KB Created: 2021-06-08 06:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 03c79e126c68c4175607940d94bd97c2 SHA-1: 22fcf9bdefb81914c193fda6c6279aa472151fdf SHA-256: 911fd98fb887ccd0bb770fa1048919fc3a2a2f6e3423c223c0235b3e1be3328a
156 Risk Score

Malware Insights

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

This PDF is classified as malicious by ML models and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document body and extracted URLs suggest a lure related to a "mobile legends hack tool apk 2020", likely intended to trick users into downloading a malicious payload. The presence of numerous links to compromised WordPress sites and disposable hosting further supports its role as a distribution point for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crewmak.ru/uplcv?utm_term=mobile+legends+hack+tool+apk+2020 PDF link annotation
    • http://amdind.com/userfiles/file/rudumeju.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a246a8f3f4c---1430113068.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/402fd13318cc478ff192553526ad9fc8/35898673900.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210607054635258272.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160999fde954b4---69909317740.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/2aq0ma2bs59g7sdm7mvb15ptsi/beluvazasorafekeveluneva.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/88e93bff6b82d03699900c156d86803d/rerunexikufu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7266714f9---mobajov.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/81652706395.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f9f28km3eg2vc1o4lahbht46i1/97021986227.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/37536818735.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/rpt709cask3t96mn8kn43rniu4/wusowegox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53A 5512 bytes
SHA-256: 0321fa2ba2c4874acd6561040594970115499c3f09487fc3f179b632627f8508
font_01_sfnt_off0000d7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F6 10708 bytes
SHA-256: 343bd68b503fded2533310eb709893c7c0f76f8c724ea082cc533b89d68773a7
font_02_sfnt_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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