Malicious PDF — malware analysis report

Static analysis result for SHA-256 517325cde204ea9a…

MALICIOUS

PDF

105.7 KB Created: 2021-07-01 20:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d06bdd955c2e1861915dcbda7e508836 SHA-1: 0fbde9b673c76d94130fc0a8941f01a376495019 SHA-256: 517325cde204ea9a9dbe1dc41929bde6b2dc1f51db333d73dc018a70d9ac465a
164 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 sites and other disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b453134d477---27848667057.pdf In PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0a8ff031cf121937598c004fd5cb6a4d/80093993843.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/ubih2f4aa9ges3l8qnh7go1ibl/vujujera.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/97097661177.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/4099e3c46ebe9f252af63e54cd9a8ce7/sujofunoxizibif.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/68b24f2e6346dff1de591683fe809c1b/lepusawixofera.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608521a30c0cb---pozokaf.pdfIn PDF document text
    • http://altinay-law.com/images/file/5517183887.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/5ck34p3hmmp52gb4kqikv6dfnk/7625351878.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6d24cb002---pijorovogileja.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd54491454---rozifego.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/805a7687858abfbe8c0abf025bcd5a2e/wikonatavuriloxituwupoge.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/66acae7d19618b6f40f36a48640d5f17/rokuzatavazez.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/nec923mpnj6sks8fn9spvocf29/tanifenezisojajawove.pdfIn PDF document text
    • http://mega.kz/media/upload/files/3577568940.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6b99ee6371ef635453b8674bd9c6b094/zezatovefi.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/tazutunedodibesaxefuwiz.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/8egahta653uq7ppa1k2aj48q3g/63657338709.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5fb51a43d9b5237a77813abeb5ada842/81370467618.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0c0e4fcce---38806488935.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/toris.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/doruvovinimirinagobotet.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/wufixaxinegotedavelo.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/wujedilixomoderakuwadawis.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d58c27f93---89868249511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kitten+coming+out+tail+firstPDF 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_off0001395b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395B 10768 bytes
SHA-256: f5dc39c8971ca5e4b32a849f6b3134436a3e8b48ac8959c530cd4ca62551e5a1
font_01_sfnt_off00015225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15225 17428 bytes
SHA-256: 7e16b6f3f95230391fbc9598459c83efd2f4c0b0c1b6051dd0a80813c73266bd
font_02_sfnt_off00017fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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