Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c2c639105b6477…

MALICIOUS

PDF

69.2 KB Created: 2021-05-24 01:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d2d67f253fa10e20fc4731b98a0a9f7d SHA-1: 239901e2c15396c8f99db42f61adbf4f67339864 SHA-256: e2c2c639105b647787722998cd74166d66332f10b81d7187f0759bbe7c5c4566
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure for software downloads, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098e06b21495---42318657377.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/dc0b0ce2cc3eac1960dda8e20882ab1c/97353008385.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/800f8c1578af532082cd491673ecb82d/wepeleruzakomivovo.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/tatibonakejukenasixedum.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/58177573738.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160808f58511d7---basisulezufulir.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/09f4129ca28de7265c55ee61ab66592b/53152152990.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/icmi2je8lgdnst7k3bu95oubl1/91948366778.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d841e2e0b---61256927642.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a453303642f---pumurozetatutemuwuxejalor.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608333dfb6c1d---85572410905.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/69800704097.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/28516462534.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9012e489---ketidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=adobe+acrobat+professional+9+free+download+for+windows+10+64+bitPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a880f911ea1b430a76d0433903efc51d/85232379901.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 5960 bytes
SHA-256: fa8a9aedacb89df6e864dd10957a9f6f5223b0553c74014681dd8bcd73e18b52
font_01_sfnt_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 11064 bytes
SHA-256: cb4e4f980d0c494e1c6dc3a2a7d8fc3db3d3531f17d0a0d153da7e1e43374a99