Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97a9e14551eacaf…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 22:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6523f9c60b8c0fc1d1a025afce745f8b SHA-1: e24827cabd44ccddc325045406919cab27e4dc3c SHA-256: d97a9e14551eacaf10f71d634256b63f5e4e029d790a80186dde8fc200ec8dbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://infrive.ru/uplcv?utm_term=cold+sweats+and+hot+flashes PDF link annotation
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/10aea01803f240e9c3cb7a5522805965/93742857916.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/5024df5dc23185decdf116f80dae99b7/zudimatax.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae67082eac0---zipiwonumisexewarexerafi.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a139e66c56091444f65fd585abec235d/88945738539.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/70972540338.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/dapimakubino.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afadd239418---34233477846.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/jofuvigulilem.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/bqnrnm862ctlciku2210nk2q22/seruludawo.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/6kcs68p39trq53ncq53sm61058/88917232743.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/23044944677.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3bd6fcc9---fabopom.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/25831176174.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/80401776646.pdfIn PDF document text
    • http://keramann.ru/uploads/files/15372757675.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da8e7b25ef---xupamigep.pdfIn PDF document text
    • https://go2germany.ru/files/file/wawotiwojijubapugadimugub.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b6e601d99---worazux.pdfIn PDF document text
    • http://gabortech.com/admin/file/xelebuvufalavo.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ded324054---murerofisa.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096825380ebc---foradubudunivujilunaned.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417bc64d24---38036081484.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/0bad2eqbv2947t81vfou69hmp0/98413085783.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/34173151121.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/57348962141.pdfIn PDF document text
    • 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_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 16624 bytes
SHA-256: b44983c299faacb93055d00b98eac3c49b0b63c1f4f6f375ebdccd1da7161241
font_01_sfnt_off00012dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14603 10376 bytes
SHA-256: 624801e9d0154638a92ab63ed22b8a8c75976445da9994e9b2d2758495b2ddd4

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