Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e48682412e60a3…

MALICIOUS

PDF

92.6 KB Created: 2021-07-09 04:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c02deb10a760c9b9a7a1d60a5f95d39 SHA-1: 1a95c842e7226490c6b30d679d8165ddb4f295bd SHA-256: 03e48682412e60a362d96bb7b3392d5e46e2c6164315db96f6a6af6bd4b8213f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://travelone.ae/userfiles/files/wapobu.pdf
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/gegurajilul.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16078f125010e3---46403431978.pdf
    • http://pension-erlkoenig.de/img/editor/file/liziwuruxuvoful.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21a3696e20---xuwuzoxosojugaf.pdf
    • http://klimagra.pl/images/wysiwyg_img/file/xujokegedikoderelopaxajo.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/dugmr2sdmef4esn1qjlndo3m0f/46930664282.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609444ffe84e9---22027428223.pdf
    • http://motoren-adachi.com/js/upload/files/vejekelifiga.pdf
    • https://dalyanestate.com/userfiles/file/nizofuviripa.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d5e39f59b79a3806b0259604147500c8/dikofuzesaguremazuj.pdf
    • http://voorwindenotariaat.nl/app/webroot/files/ckeditor_files/files/guzixefurufu.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5ac8cbefa---vofopigixatanirofuman.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/20516b7b832c1e73a743f82e3fa6a471/mivulozejasuburubixusuxu.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d3478a62685dd6d11d2a5ffd2b0c0470/3500305136.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f94ea659c---jitusupitawimababidulanaz.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a1be53304---22130882577.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2ace50dd1---47755492568.pdf
    • http://a-kamen.com/userfiles/file/pegep.pdf
    • https://bursac.net/userfiles/file/17071914794.pdf
    • https://agrilaui.com/userfiles/file/8657526524.pdf
    • http://www.awakohchang.com/image/upload/File/irezajazibixarit.pdf
    • http://ozanatalan.com/iboard/includes/userfiles/files/25490139756.pdf
    • http://rcot.by/pics/files/gomepedagudivavufusogisep.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac96afa0c---44140623117.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=inquiry+based+learning+research
    • 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_off00010735.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 16792 bytes
font_01_sfnt_off00011f4c.bin
da2847933328dcfc9c82aec8a2de395d87b9025ba6097f55db0935bce1a47372
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 10884 bytes
font_02_sfnt_off000137d8.bin
6515cae0a70ba55f155b7063f7e811b4f7e9615f72902598c99a75a438e8b7c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D8 16872 bytes