Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d89670f271d3c63…

MALICIOUS

PDF

75.2 KB Created: 2021-09-14 07:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: ef95f003b6ee55691a74988f0adebabb SHA-1: f1055a49e18dc5a1d21086522dfed1a4fc6bee5c SHA-256: 3d89670f271d3c63fde32b4f4b2b83647fae8ce1820e8eb56344db4d0f45768e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/miwefakurekupis.pdf In PDF document text
    • http://stark-tools.ru/images/uploaded/kematavekuvilosesed.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/37354491807.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/rujiped.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/ritazapixepaditomibewini.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/gevifapuvezas.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/26280888298.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/12308689674.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/812da90d672ed9a2e41c45c3d108299a/63350624631.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/80148999521.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/56061571899.pdfIn PDF document text
    • http://aromata.ru/upload/files/lawanaruw.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/74805392157.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b559c1b251---lokuzivisufeluredovuwi.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/moravokilu.pdfIn PDF document text
    • http://www.pilartangguh.com/file/lokatesokulovagedelis.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210912_130231.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/ribar.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/68172427271.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///885401739.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/rowomas.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/70150821438.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/zukupinima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=list+of+phrasal+verbs+and+their+meaningPDF 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_off0000c220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC220 17060 bytes
SHA-256: 87aaa782f017939cc03cd68e9653ae748d707d54c474d13009addbf4762fa3e2
font_01_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 11108 bytes
SHA-256: bae7aa36034a2adf43a020940796f8ddbf37d572b742c62ae14ec73e5e62cb80
font_02_sfnt_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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