Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74db95a8beda654…

MALICIOUS

PDF

70.8 KB Created: 2021-06-28 22:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a0975e3febf5dd6005d756e7ef7faea SHA-1: b21f8fd0394fd026f32e479a9c0be1511a324742 SHA-256: e74db95a8beda6548956ffa9195bc8939b3ed456d6666874f728309cdb884251
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and presents a link farm pointing to multiple compromised WordPress sites and other disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • 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://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abc5f60bf6---63774193809.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d476f3384---toxedoliziketifarej.pdf
    • https://giasusinhvien.net/upload/files/85170968588.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/c66j4rt3ikffamt4m870u1ca05/zusudanexawoworixunudol.pdf
    • http://tscyw.net/userfiles/file/20210624052350_ig6czc.pdf
    • https://isosklo.cz./uploads/vakuwijejod.pdf
    • https://ludbaegitim.com/calisma2/files/uploads/44606391986.pdf
    • https://dodatnagarancija.com/userfiles/file/bezeg.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/64311917c61d60c8a1805b36e3e18f8b/94479766244.pdf
    • http://hataylezzeti.com/resimler/files/25131473796.pdf
    • http://motoren-adachi.com/js/upload/files/20173093723.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83cbda6bf---75196869781.pdf
    • http://sooclose.eu/upload/File/56402871178.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/d43951dc8efb96813f397cc69ff588c2/xujapidixaju.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/lejikak.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a947af988fb---mijifikupam.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5f9b75f478c5468a2f07b2c7dcebbfda/60166912294.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913dcfd2fd2---gowivululematipam.pdf
    • http://acecaalcoy.com/userfiles/file/toporojezuzasekad.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608bebe3a787b---11925320435.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085d661482e4---melozumeluzamaxunovef.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608867dcb23a5---kimeluzebikawefozanix.pdf
    • http://xn--b1akwe.xn--p1ai/userfiles/file/16517290464.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/bf176246d991b449595cb8a997334d5d/katagivuduzodezokidoki.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/ebb869073add1a7fa8cb9b221f90a57c/bekedogalunapugor.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=easy+and+healthy+lunch
    • 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_off0000b8d4.bin
881309ed3a4d28cc3056dd537bd15725d1dce456423126d1ada94360caf4f60f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D4 14776 bytes
font_01_sfnt_off0000de6d.bin
a6a763229380aaafdf6698ecf558fc68e5fb3c56e0598ab205f1a9faa00cf49f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 10352 bytes
font_02_sfnt_off0000f5cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 16792 bytes