Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46cd1682d7d9d1f…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 03:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d9e08c88620e179fec94adb401acb1e SHA-1: 5618f8b78f5b25c2bf777ae86f315184feec46d1 SHA-256: f46cd1682d7d9d1fd8e9527521cd80ba4f89cf9efccf76feee2bb8fb57a79d10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://homestationrealty.com/userfiles/files/laxotozemaguzizetabopom.pdf
    • https://betenagro.com/sites/default/files/file/pepikiwidopekumidep.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/e71daf858553d4467abd988f97cbaa0a/87300331665.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc074ce23d---14114866960.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1sm08rvgca0op045ouf68cmt64/morababedixogezelakibaka.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbcdb993c1c8acced69fec29c4c69275/17692146089.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/d0d461b1601f0fcc9e46b193fb46436e/21508325650.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/f3ac627da0a1ef9d2c3715e03ebf505d/lolipitaterozifarerib.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a03142cf901---rimefulifobidupusote.pdf
    • http://oprfhs70.com/clients/879438/File/guxewi.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0r9ob5utpcruogn8qddk83otgt/divatep.pdf
    • https://schmitz.cz/res/file/96682871201.pdf
    • http://arci-mp.fr/admin/File/nozolutedibalajet.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef54614875---doviwavosoniro.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721f87d00e7---banasatorupa.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/i28mo4uodhashbid0sb3ges3j7/48855985437.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5d1bc39d38900db62c3b51bb4e7ce86e/28674508989.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/32f5fb5f759714369b54bf6b20c903e9/76453755836.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1671e20e---71124871295.pdf
    • http://denis-lefebvre-services.com/fichiers/file/lixituxunezer.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0faa34717---kogetisumubivogezumele.pdf
    • http://musorcentrum.hu/files/article/file/datetepo.pdf
    • http://haisushitogo.com/uploads/files/vuwisavonebutabatonod.pdf
    • http://hakkabrothers.com/userfiles/file///totukilodoguzirasak.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=2nd+class+scout+requirements
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://www.scouting.org/coronavirus/covid-19-faq/
    • 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_off0000fb81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 16792 bytes
font_01_sfnt_off00011398.bin
4a22d5810cf9f5b0b4241c71fa69d0af810ecdf4f1c53ff1ade60af4d010469a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 10800 bytes
font_02_sfnt_off00012c4e.bin
2a007e39a0b6a49c0b86bd7313eb52a948a4594247f27f5746b2e6d3b9e61d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4E 17624 bytes