Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ad0a6fa1d9823a…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 03:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3902eddca4a39364ebcb4f9e7d11fbc7 SHA-1: c1138f1788030864450a87e8dcbdd7b4e35cbd1a SHA-256: 12ad0a6fa1d9823a882923725e7efeaa67b6253cb736e04973da320d9c44fb22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm that points to multiple compromised WordPress upload directories, suggesting it is designed to host and distribute further malicious content. The presence of these links indicates an attempt to lure users to download additional payloads or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://whalesart.com/uploadfile/file///2021062808495188.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7e26eb011---lorolamugivenasokidusin.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ecfnrinq11jrn0q7q1127ihpt0/fupese.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/8c5c124241290fc5036d47ba3e5c6b40/78479362023.pdf
    • https://rmp-traueranzeigen.de/cms/files/83874317806.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/69e3b5a7ff1aa6ae16bcea531f371625/11298051915.pdf
    • http://nextgt.eu/uploads/file/wejerutunimoxubolo.pdf
    • http://caratow.eu/userfiles/file/fesikagavi.pdf
    • https://marljivo.hr/UserFiles/files/desexewozowida.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e29370b5b---movadenaxuzadalatejimu.pdf
    • http://vivaibonomo.it/userfiles/files/sofujogarusoti.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/baa748f02d3ad88c22717c7e3cc236f0/xugekiwirowuse.pdf
    • http://mini-garden.ru/userfiles/file/munonol.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21d75c982---23370280892.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/tihrg242jtk5ac014o6jsmq2hi/surajadofalakifezevexu.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cabf85c734---76261501233.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00d8ea1c6d---55309576360.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fb2c23a582aa6a450d8d80eace81376d/saroxolas.pdf
    • http://sevimticaret.net/userfiles/file/33275333765.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/tesagugukanasifu.pdf
    • http://scro.ru/pic/file/dotiwariso.pdf
    • http://studiotecnicoforace.eu/userfiles/files/zizusukaxomiwira.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13381249e---26541386446.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dc6b0bcdn90sn2vnn8e5j5rqgi/pugafimopisoxinagoxam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+andalusian+horse
    • 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_off0000ebb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 16792 bytes
font_01_sfnt_off000103c7.bin
fefcc7d0101512fb61a465b84cce6ef3c039fa01d0204b559b88ad15f992ea07
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 10312 bytes
font_02_sfnt_off00011ad9.bin
58d2135c40b07370dedf40fa3f50b43441dffcdf234dcb074ff6f9273c88328c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 17244 bytes