Malicious PDF — malware analysis report

Static analysis result for SHA-256 397552a0a7d126c3…

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 16:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a1ba095e7dd88c8d32c520ed26bbad6b SHA-1: 20648af7723631a63454fe8d3fb8492b8bc7d273 SHA-256: 397552a0a7d126c39893888df7cb520678033bbafcb282a8af60869eabd7b12a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gujaratisamajparis.org/upload/files/49035138923.pdf In PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a67809b1---49892084230.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-2/20210802044609573142.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/10217225337.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77a84c95b6---laxofusawebuxad.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/hebbevj22eo7psnr84jodqr6ir/51846737188.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607390e9164ce---keromikadofuzurolevopu.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/sazafib.pdfIn PDF document text
    • http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/90438662149.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/3fe27a18a7ebc8347a372cd8d0d59d5d/24294115785.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/16925092567.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/38e7bacedc0ad848020292ebbbd3d033/nemagamanisipiw.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/gekumikijegune.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/11382906662.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/fomuzutojisaxovamusisaf.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/8977640726.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/43262466992.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/20396166976.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/gexafemijapivodiso.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aa35e1dd1e---28038844266.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/fbgs3q28sbh9egsjirr7j0k39r/filojosagetojarugijinuzav.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/14838619568.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/45075805340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=introduction+translate+in+tagalogPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 18952 bytes
SHA-256: b83a9d0fa6febde4f8748117d881ded471d9e6bb915806232aaa922d1fa5c017
font_02_sfnt_off00012b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B57 10596 bytes
SHA-256: d6e864ff64820e4789a96fc38ccba24e4390d8e3436b526db88da9b4bd1c6450

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