Malicious PDF — malware analysis report

Static analysis result for SHA-256 7960406140c23285…

MALICIOUS

PDF

103.8 KB Created: 2021-09-01 01:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e62e9d96742426c542a20cedd4fe1278 SHA-1: 41fb26308558d1fa44158dd02d5699781dd9097e SHA-256: 7960406140c2328524eb6dea056dfd5f799cb4a5903d2ec35fd191c362323030
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous links, many pointing to potentially compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and a high ML score indicate a strong likelihood of malicious intent, possibly for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://nolimitscenter.be/peausitive/images/FCKeditor/file/71717428131.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a65ec34d869732384aef34543f7af5cc/nometipivowipatedi.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/1055239597.pdfIn PDF document text
    • http://altinay-law.com/images/file/wesurufomotapafem.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/texixonuwuvobupowi.pdfIn PDF document text
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/36104834766.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/vagesizidibogiw.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/pupigojeninoguzodedir.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/84507301067.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/dejijubevowikezijugil.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/27c376da4b17b82681d35007dbb67ab5/79151705109.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/86266935586.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/11ff5476acdf8e755404e73e4a9d3146/24662148947.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160771819c6c5c---josexanovotelepov.pdfIn PDF document text
    • http://findusafranchise.com/files/files/nazojegowe.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ieotps27iusjh60jds1m8vais4/mekavipinigilexepanuxog.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/merebukaluk.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/p7959cq4mq2f2197p1bubalpfu/90489023285.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3343ea52a---jetunadilopalogogex.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/1059698796.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c503a22bc1---jubat.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d267bb99088---fuvimoguxomutosi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/358d33592fbc2aac7e7330936b1aeaa3/91058968572.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48dcce3228---22456942238.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b83cb810fd1---41967555075.pdfIn PDF document text
    • https://cncunse.com/d/files/fekinaxekusuzavidutu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d223eae4eb4---gesoruviwepezutumesivan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=susan+anderson+barristerPDF 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_off00012dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000145f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F0 19340 bytes
SHA-256: aab4972f57b32cfbb0b64a77cec502e99f7399826c20eda7f4af4ce1bc1a4b6e
font_02_sfnt_off00017862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17862 10512 bytes
SHA-256: 347de21217dae8a1318ed1d2295dda9f4f625b1890e5ead46a2dce534605feb8

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