Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b001366b37da39e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-11 15:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a33aa0302e71c07d0b2be6b1dab44566 SHA-1: 4e402310317350657e001fd12dcdde441135940c SHA-256: 0b001366b37da39e1b78632c96068a09926bdc9989b8cba1c7c989b7fe70784c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, disguised as a download for 'gta 5 data download android'. This is a common phishing tactic to redirect users to malicious sites or downloads. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bi-kiesabbau.de/cmsimple/images/file/wonoto.pdf In PDF document text
    • https://jahanchart.ir/data/files/file/lalorizeranuwake.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/polaxulotagolifurexexujor.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210901174901234.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/83635885673.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-9/20210909203725296319.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/24035478630.pdfIn PDF document text
    • http://klinok-saintp.ru/files/59143496292.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/bevolawebu.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/86945513351.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/98513563363.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139e5f960694---favixowogiriximexu.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/zubuneteni.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/90839523551.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/muwunim.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109091946464554.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/oanddtqsceog8hqou57u1gur1j/pifum.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/24022045319.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/gegugaz.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tiloduja.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134a50e5d048---82573068807.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210903100225.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/43465757862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gta+5+data+download+androidPDF link annotation
    • 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_off0000c9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F1 10200 bytes
SHA-256: 069093e7f3e0f04900ac7e4020e6067d50439da4363d79437cafa3a0ce09b7f8
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 17232 bytes
SHA-256: fc40fc88ef876358cdcdeee9071d74c8b171c1e21ed677032188f292ae2e817a

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