Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf01b74feced5d07…

MALICIOUS

PDF

70.3 KB Created: 2021-09-02 18:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: df7a390f86429fc0690f6f2433dd7b8e SHA-1: 15c24bcb05f7cb7716bcfd6421555529dafe1444 SHA-256: cf01b74feced5d071bb1d0b6af850e7fa899d7e8839f276ea077b0bc12858ca0
154 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and ML classifiers. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm or redirection scheme. The presence of these links and the PDF's structure indicate an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/22420f789200b296f343a44e397ef4e1/mudufezifa.pdf In PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/digonigedisubolujita.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/35274374152.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9c9092b9---nurafiwunafosotozuxo.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d917c6568f1f1eac7272d23f56011e7f/pitiwagudisobiveropozujan.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/136f9105ead624b3d2ca3a0bb4c9593d/katerigozup.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/doluvenud.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/supalevore.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822f495e231---26385867987.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/985a9a19286e3ffc5a9d544bbd5a64bd/wixobip.pdfIn PDF document text
    • https://cakkue.com/contents//files/ligisajezipuxoguserilun.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/97451977574.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/daranekizumudesar.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/99974621606.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7ppkc6relfdh5lir156t38jd1f/kirefisizogomatufomada.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/saxagotukojixu.pdfIn PDF document text
    • http://wsm.hk/images/files/9341511760.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/6970675041.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/96226540109.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/zosurexeziranifawetumu.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/xivevibajefokotiziz.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/derofixobefivet.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/xulalozowatozifopakimiba.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161157673a14ff---jidonopix.pdfIn PDF document text
    • http://hasyo.net/files/file/rojike.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/66035587190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sekonic+l-398a+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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