Malicious PDF — malware analysis report

Static analysis result for SHA-256 7341da406e2b7109…

MALICIOUS

PDF

79.1 KB Created: 2021-08-04 05:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ace437118e68659d0342e48ea3f3d148 SHA-1: b6029020256c18177a742c383d5a3bf8dd1a6857 SHA-256: 7341da406e2b7109c2064574d4108fd4e9d703917449000e7335fafa05b449e4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS upload directories or disposable hosting. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. The embedded JavaScript and link farm suggest a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 https://medvor.ru/uplcv?utm_term=ejercicios+sumas+restas+multiplicaciones+y+divisiones+pdf
    • http://octvads.site/js/ckfinder/userfiles/files/pabivuribedobawugo.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25804f408c---xonadunuvabamulasi.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3fd2e05ff---88215611955.pdf
    • http://tafgambiatours.com/userfiles/file/40817334549.pdf
    • http://mojahotels.com/ckfinder/userfiles/files/lopegobesumikatoduf.pdf
    • http://hoangnamjsc.com/upload/files/89610613555.pdf
    • http://fapannimario.it/userfiles/files/17379226775.pdf
    • http://perles-del-beya.com/userfiles/file/27566930616.pdf
    • http://barcelonasixtytwo.com/userfiles/file/woranagiro.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a61e614cf---26804390693.pdf
    • http://evevoyance.fr/adh/.-/file/9015171067.pdf
    • https://floridainvestment.cz/files/file/gejavaxopam.pdf
    • https://mangmalungtea.com/userfiles/file/38324591231.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/576ugoeeqp4hg76oa6ttgsvm37/rirapisusilejaxokamapif.pdf
    • https://ludifrance.fr/userfiles/file/17514467898.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4ebbce0e---fujilevofuxibofutesi.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bbeae396---65647098052.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/162f0abb606e1f1a1f7fc2a78a43db06/68192307852.pdf
    • https://lemanssrl.it/file/wuvowovimububuwabekepovos.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeae08323ad---48046638476.pdf
    • http://iaestedresden.de/userfiles/file/jufomawesedubujujuforu.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160750676c1735---letavurimo.pdf
    • http://gld-lining.com/user_img/files/zovifiwi.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160946b349a409---fenije.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/31054805312.pdf
    • http://kppzp.pl/userfiles/file/70511055732.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 16792 bytes
font_01_sfnt_off0000e5e2.bin
79faa0f1a210ca006e6aa0dacc514dc8ad56633ca62e5cda54fe0106752ec963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 11172 bytes
font_02_sfnt_off0000fffa.bin
b39f52684d0656cfd8575b404b426cbbd8531445795fc162e7183d76e36870fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 17560 bytes

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