Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2a054ca77f72ae…

MALICIOUS

PDF

87.4 KB Created: 2021-07-17 23:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1aabd1e51b8d5c77fd144f61e446b07d SHA-1: 035783a02a9d2ec48e5b265c3a3757517459b46e SHA-256: 0c2a054ca77f72aeaf306b8355ac391b1c7cac245c3bded9736a668c7acbb629
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the formcraft plugin's file upload directory. These links are identified as a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support the malicious nature of this PDF. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160707b7953bda---74045081592.pdf In PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f752138c48---43146743638.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6fcaac6b5---poxifutetagavimidizireko.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/5819473133.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd49f8929c---zinibimevuzesa.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160754cc46d690---dikomepoluva.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/22214781334.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c27754c17---11898499775.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/ratevubile.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/is2us1uhmdited2s2ar4j77gq7/90269888594.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/613124e95b5ca81b1855d2a224c5a6ab/3946874165.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/nusuxutukosejuzamux.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/piwarovikawopuxawarajip.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ldk05ve3v2ss1avhmq92kaiig0/dixikogeji.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/37645276391.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site//site/data/files/kexalowubidinutekos.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/0c4270c960306ab4c00dc7f83c3f8ee4/sasedeweseturobanigenotuv.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/raxikagofude.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/d77cb55b8a18a6e41b8869b061dc9b4f/25159116978.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/fiwerizofumilofexazifegi.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/7393682502b6fcd894745ac15ca67281/zozowujuvabokuroluwuto.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/52sha5fc7kf3bqca2pg33p245s/69110052969.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13585ae0a---93381143698.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b523a641727---jidepego.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc515cadacd---1282140474.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/gl9tuqp42kqnof4mq5l0tff0tb/nokibenipiba.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/monileriseveje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=adjectives+from+r+for+describing+a+personPDF 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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 11236 bytes
SHA-256: df13a4cb0aa9b9861b3eb96721920fa58700c6ebc35e5db6ad8e4e60691ac601
font_02_sfnt_off000122f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F1 16804 bytes
SHA-256: 1df3395e9dea4fd4c3689fd5e6e59fec94ea78bb786521f00c5d19ae50950bb2