Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a49eafc6661ee1…

MALICIOUS

PDF

63.5 KB Created: 2021-09-04 01:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 99f22ec1c2ee5493d8b4e35c62c92cdc SHA-1: 62b9e233f008e372138169c52431e7f74d25f6f2 SHA-256: b0a49eafc6661ee1550d05fe2ed6bcf4b3e9ec2cc1e32a6a4aace2ea58ca3942
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6536

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=ecg+interpretation+pdf+free+download PDF link annotation
    • https://snoman.mb.ca/ckfinder/userfiles/files/wixuvumexasami.pdfIn PDF document text
    • http://www.celso.org/download/sujibukuzela.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lep0k3qjc3ihc5g64trnhftgqo/28157119475.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/kosefuvam.pdfIn PDF document text
    • http://stmarys-perthamboy.com/upload/File/xamilodijinikevu.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/febazopajevogi.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a54744caad4---pomibovijubozevapigapex.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210720055124.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/desif.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/8801625317.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/74070466166.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/foboladudejojovubixabazis.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/86541100229.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dfae86ebc---besajisewozenitemebutozin.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/23388105079.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f735a7dcfb28c002242ef7fdec90fc39/79057926587.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/sujodadojejesonimiwe.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/4b0bde162445538655cb5d34dde58b07/sisemozudujofenaduzok.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be2c7b2e7---79643848265.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/pelajekuravoga.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607500efd3f57---talezareguzasopeb.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/07pteh227nde5sogevhme97ir6/bewasogurajosozemo.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7f302481---kuxudanijujobo.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eacc58bf1c---34682465024.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c4680a56d---pujazulilorixobiru.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 10696 bytes
SHA-256: 31161ea17125e47ac39df0148ab809ac80db9144a3c740f8910b6237061d2c52