Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e23e57054baeec6…

MALICIOUS

PDF

103.7 KB Created: 2021-08-16 04:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54efa7149e407d347ed4ca84d6d266d5 SHA-1: c98cfa0b5a335c82675c988edd86305b0ec20c42 SHA-256: 0e23e57054baeec639f104307bc03f30e290af2b996eb203ff7a3dff02d39ee9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded JavaScript likely serves to obfuscate the malicious intent or facilitate further exploitation. The primary goal appears to be redirecting users to malicious content, as indicated by the numerous URLs and the 'link farm' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://huntic.ru/uplcv?utm_term=test+psychotechnique+exercices+corrig%C3%A9s+pdf
    • http://tatishev.ru/admin/ckfinder/userfiles/files/fezepemowegixonajumasal.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fb24935edd3---33634438880.pdf
    • http://westernmaki.com/uploads/files/galevufojegujefitosex.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/xuxemo.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/8t7tn4qkucceg0isjmqfo6i4d1/49416007686.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a35aa2ce4---15074974483.pdf
    • https://dentalrud.com/userfiles/file/nixijanoxuto.pdf
    • http://hiddenroots.org/clients/19739/File/67448551422.pdf
    • http://afghansolar.com/userfiles/file/zivogokomimutaxomaju.pdf
    • http://ebiocell.com/uploadfile/file///2021063005570985.pdf
    • http://manavpublicschool.org/manav/userfiles/file/38888307317.pdf
    • https://dagvandearchitectuur.be/_files/file/xuxepijopifoter.pdf
    • https://vivekanandbawwa.com/userfiles/file/73728401430.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbb3986685---46813448817.pdf
    • http://abwingsde.com/uploads/files/kulifepesofatumom.pdf
    • http://metrocars.london/survey/userfiles/files/31676857753.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9nd9bv8ldpabhc1l8t6abpkg9s/gawavosivatazifuriwobu.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/fd6085d3ef637126904a784aa2c30e47/zuwivijezotikamajasinuba.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a699c36e14b---65639997242.pdf
    • http://canxetaidientu.com/images/file/webunizitigeziduwu.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abee4e5d89---gafegirikoturavidi.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607220aa647e5---81974433655.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076628e7d74e---demakoxivalufovupipovo.pdf
    • http://gaishachuukobuhin.com/js/upload/files/sedejipilelagawuzawobo.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_off00012a0c.bin
421a60ddde5ce611bb1f75fc5fbd067a1ff210b83f85e141bab75579312b0165
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0C 11268 bytes
font_01_sfnt_off000143af.bin
06a55f1d0ac6a22a98ed25da4f6570efac5f546410e5298d76bd4a6be378e378
pdf-font-stream PDF embedded font (sfnt) at offset 0x143AF 19724 bytes
font_02_sfnt_off000175a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x175A6 16792 bytes