Malicious PDF — malware analysis report

Static analysis result for SHA-256 600669ff28886593…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 14:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d102753c95355df1c8f1997d6d2d8c1 SHA-1: c9947776f57bbb221ed34954a227b71f3bb28191 SHA-256: 600669ff288865936b24733da4fcc04cf31d4e8638a0f0cd0fa036b07ad2121e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to various domains, many of which are hosted on disposable or compromised CMS upload storage, suggesting an attempt to obscure the ultimate destination or leverage compromised infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://agencement-menuiserie-var.fr/stockages/files/31506990489.pdf
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/fogawaliwipoda.pdf
    • http://cycling-software.com/files/file/9523947883.pdf
    • http://nkmate.com/FileData/ckfinder/files/20210821_34452D3208FE42D1.pdf
    • http://csc028.com/userfiles/file/20210613082811_cdodf2.pdf
    • http://alexhofford.com/temp/files/file/penovekipegadovavudifel.pdf
    • http://aite-materials.com/upfiles/file/bipirevuzanonemotem.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16095d7899da46---bubixuvavavesaduzoj.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/59681592719.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cf538112e---lonabi.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/5b1p2kn5bq2lkm6kdp9fogqjs0/22055475020.pdf
    • http://t-eamplus.de/web/editor/files/devimafofu.pdf
    • http://saraiaser.nl/userfiles/file/vizurupidasogokove.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeed0c21c4---laresudukudaparagezov.pdf
    • http://kiszelyugyvediiroda.hu/docs/file/jutifam.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/3d9c7e759395eef94cf2681c57ddf671/68060082749.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c628fd1bcdc---sovupafuvon.pdf
    • http://fvv-hohenfelde.de/sites/default/files/files/23977613190.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c62cd91f4---46074172848.pdf
    • http://detikakdeti.ru/img/file/luwerutofujetezitapafo.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/34795182829.pdf
    • http://vncanada.vn/uploads/files/98263716719.pdf
    • https://dienlanhhonganh.com/images/pic/file/xejediz.pdf
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/42438957456.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+sexual+pleasure
    • 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_off0000e391.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 16792 bytes
font_01_sfnt_off0000fba8.bin
dedb3620e103404dc4fc971eee89eab79aed5587a13c595f8a2252a78900caf7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 10632 bytes
font_02_sfnt_off00011413.bin
e7f60ba39239db35c5c811f877a03b31ee3944c002a6af7c451e7fcb1bd249bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 18940 bytes