Malicious PDF — malware analysis report

Static analysis result for SHA-256 3464db42667096a6…

MALICIOUS

PDF

77.9 KB Created: 2021-09-08 01:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 076db2eb25a6a316df21d09313864916 SHA-1: bcf2959e5c3e9e01d64cd54099e0e9e275ca303e SHA-256: 3464db42667096a6570396f1c39fed2d730deb56d36b321801aab842cbcd02b7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Additionally, the document exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://camping-du-lac-dijon.com/fichiers/79722614461.pdf In PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/43302448268.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/fae3fd5aeb767d7ed46134a8c8e0fbbc/zeseguzizase.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/golalemuvozebusozineb.pdfIn PDF document text
    • https://amblamy.ee/upload/file/wekepasolesadi.pdfIn PDF document text
    • http://novichiha.ru/pic/file/takitijoxeseweviwi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/040a382d811e6ac67bf31b36bd38da94/21570638474.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/jodifipadivenunozemagura.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613676ddb5481---majutumikixuko.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/47298120493.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2ov33369e6pqo7a2usckpeor2h/45144491499.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/norumijimedili.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/65075507547.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4ad97e0de---dosurisozosepi.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129e5a8c4767---13945795070.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/46622537675.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/waxezuz.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3b5533ae---6214018634.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/wemezedamax.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/laroxetonumew.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/4299244635.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/zavikekimegolij.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210815040328.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95451ba19116530bed9b2972bad83a6f/25801788158.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f87869ede4752a461d44ee1cbedddc7c/34671056564.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f80a266a0e---lovifazot.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/87caeoj4mthlngruula93skt87/gavezujeradenas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tetragonal+distortion+of+octahedral+complexes+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB44 11132 bytes
SHA-256: 1399b82e27bc0b1d4164ebdca89113556e2db687c969354a53b77d07c507b42e
font_01_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 17104 bytes
SHA-256: dfa3eccdefdbfa56d7127e1d07adbb228f383337851241217168d65a72786a53
font_02_sfnt_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1