Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6ea0192243ef8d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 11:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 48c7e73a8365c6d81b5fefc40c42d61d SHA-1: 825f052ec010d945309f9e65b7733dd388a830c3 SHA-256: 5f6ea0192243ef8d92c14146ace0bf2f6acede207c3b30e6bf3b3bace4b51a9b
156 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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://irlanc.ru/uplcv?utm_term=strymon+deco+pedal+manual PDF link annotation
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079abb2cd491---17913272306.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4335c15fd4a0cf90626d0940a16c9bf6/12607006515.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202108151058084601.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/97296254372.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161292f575ceca---muxik.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa2f35c6ab---85140189649.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e4312f042ca645ecad8604cc67f56595/nokafabo.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/47452384416.pdfIn PDF document text
    • https://intellicapital.in/ckfinder/userfiles/files/80334270498.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/80976229208.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0831442001629523947.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/sijamepebobunoniwuvi.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/4fa17b0559676e25c8070a86ea207445/58688271706.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8503d5f2---19691356924.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/but99c3bs3lt3oc1raf93u0co5/14077466056.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/5jnalvq2n8dfe4pkpp7e7nj6qreapat7/17318068778.pdfIn PDF document text
    • http://grandviewheightsalumni.com/clients/79364/File/mifizivir.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/22471473271.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/34353178463.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/pumosujiwanog.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1624478100.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/mazotefematuzexo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609d34ec6acf4---35938932813.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 18416 bytes
SHA-256: b3626ce3307d73a2c31e598db283d13c49f717fc3e16e41f2ef10ec82006f902
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 10704 bytes
SHA-256: 38ace977e6913eb99bb49eab421a621910e326d6ca9fce5d04605dbbc4f4d5a2
font_02_sfnt_off0001206e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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