Malicious PDF — malware analysis report

Static analysis result for SHA-256 692484523c99a334…

MALICIOUS

PDF

129.5 KB Created: 2021-07-26 02:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 19203ce04e7a2538b78e64f6d04c2399 SHA-1: 4601e39f79c5dc2fb90a075aba9b1cdc8893d2d3 SHA-256: 692484523c99a3348b4fb15279cc760ee8a5d4c60216fd4aa235135297d7c5b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious content, potentially via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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 http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e845f14b16---telulizuxerotukivadoj.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/dbf3d90e513c6a9d1fbe4b925800065d/japenidatirawizim.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160986bb56e3bc---25847399721.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/61579351557.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/95095414692.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/78846782501.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69b096ab59---mibotaforusap.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/seriwikuwalanikagunubete.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607236decb515---dimuxaxoze.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7af75a553c00c75a969f7589be65cc3c/40353478176.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/13253067224.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/e6877d66a30c96cddcb4e250feef1a2d/xofexe.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/66bocr2p1trb3lpl06dbvtgov7/podakiwofeza.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/28849621088.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7u18c6v2kfjtpjttltos68nh7/zalevagigurivomabobas.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/81a56f10626d9ac96f4c076a231810ba/56343238390.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160893a5ea6b79---87150615905.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a82c4506d2c7b35713d8ec56860ac052/27296458907.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/42110341875.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085537f24c2c---renubujafixezukap.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/207291280.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/mojagilojibosuso.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/pupekotasitot.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/911e51a287f8c07eeb80e40dd3fe6f27/98462852504.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97278be10c---kaxanixunabigemurabel.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/50856985012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=s%C3%A9chage+des+plantes+aromatiques+et+m%C3%A9dicinales+pdfPDF 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_off00018722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18722 11544 bytes
SHA-256: be06763a5c9d9ae8e1bb231fb72a33d45cb9cab7c0ae6273bf0312741bc276dd
font_01_sfnt_off0001a17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A17A 24268 bytes
SHA-256: 3c3213445c489a3b0903f53f3cb1bb061b3091d16b649e4799876c40afecb275
font_02_sfnt_off0001dc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1