Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0a2f3268ae9ae8…

MALICIOUS

PDF

89.0 KB Created: 2021-08-17 19:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af882845063f20cccc98ad78595b2bd8 SHA-1: b9f4d5f879d329eb8b8ccb6c02f73eb555df2d64 SHA-256: bd0a2f3268ae9ae8596563be931b4731781c7b69485d4d3b12f41db2a6021f20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, indicating it's not intended for direct user reading but rather for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 https://catamma.ru/uplcv?utm_term=what+is+assumption+of+cost+volume+profit+analysis PDF link annotation
    • http://kasargod.net/uploads/file/2983158729.pdfIn PDF document text
    • http://goldmustang.com/files/files/zipitale.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/600dd49cd74f25b0ba3f5c513216d927/89798737827.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/j19q73mluh37bh7hov0v7thhgn/josoxutebax.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/xepajonazumos.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ec25d82ca---kagumegulaluxi.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/46136842335.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4d3a56c39---fekosomofegefuvevi.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/18208577333.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/44332371738.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/91500980460.pdfIn PDF document text
    • http://promador.pl/userfiles/file/dakorogejojewudiwokaxijem.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/73490189259.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099a90ea8d15---ruwedinirulilidesulow.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/farusovapi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/nigezomam.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/831400d2fdc9b2ef55a5418d9ba46a4f/furifezuw.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9793854af2ff9234ff34b83479e7a5d1/27688005711.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/xogisosatoxuladolor.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/44722400832.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1347c3e306f4544f9d95993500127a76/zikawuzoxofokatifutij.pdfIn PDF document text
    • https://yellowstonewildlife.com/potinarasometet.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/10037793816.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6d2c53559---bazumevew.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/95n2gqtrrpd8s5ev826i12m4a2/6710304256.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/26505790279.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 16788 bytes
SHA-256: ce578828f40c012edb29457e8a56f334599198ba7cb01c02369408037f1da262
font_02_sfnt_off0001398d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398D 11020 bytes
SHA-256: 012f5cef17811506be707a02df13a06aef5db638d5757fe603e8cb8bd10f16f0

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