Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15144d0af238032…

MALICIOUS

PDF

76.0 KB Created: 2021-10-09 01:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8ab4e484eb00364a1c778939f7294725 SHA-1: 50c02b77eeda9ed6ea0b16faf10645870bd250a0 SHA-256: a15144d0af238032abb1a63079fea79fb1ae6a28d68c574f230a5d987d42958b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://gallerylingard.com/uploads/file/69898266186.pdf In PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/sanepatesukimewen.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef50b8e817---sisuramexeriv.pdfIn PDF document text
    • https://soechi.com/userfiles/file/mugafotulaviladu.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/18129992645.pdfIn PDF document text
    • http://freestyler.cz/img/file/49939383635.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/jonel.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/salasonafelurewiwomowobon.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9ef14654536ea9655a11a48dc073e059/togaj.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/25975570990.pdfIn PDF document text
    • http://vlajamo.cz/images/file/xojupowafifoxebadolor.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/gagadatodi.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/nobevumumudepupitijafuzon.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/12127313900.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/kimoxur.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/72b75b09fca471787658188a1dcd4f14/linapopilu.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/46868485808.pdfIn PDF document text
    • https://conrays.ru/f/data/49153962823.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/zakagoxidijopanov.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/nifokusowapi.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/diwafepivasoka.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/doripixota.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/31716d9b5e9da49378e9553c6b6bd1f2/69170152528.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142efeb7583a---lekiwifuzesezerelufelaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=arcoaire+max+performance+10+manualPDF 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_off0000bfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAE 10732 bytes
SHA-256: d0f41ba1e3566aa75e02782282774f8b5e963afcdad0c9eedbd8c565105e3edf
font_01_sfnt_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 19188 bytes
SHA-256: 05cde858899a1734260c27efdfbad9566ab83ba88081016472bd97f73c1958bc

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