Malicious PDF — malware analysis report

Static analysis result for SHA-256 b864ce63e5374a02…

MALICIOUS

PDF

66.5 KB Created: 2021-09-11 21:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d09e96a7f8a7e7f5e5a7893a9e3412d4 SHA-1: ac80c53e46d6d7ad9e32b634e6eeca746c95e21f SHA-256: b864ce63e5374a025619ae7e233d71a070f14175625d96a65228a2383c49989c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs and the document structure suggest an attempt to exploit user trust or curiosity, potentially leading to credential theft or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5755

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://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/9vvefvqq31p2i5t8qd3m37r8re/12995274113.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131822085d43---fiveliduwegaloxiro.pdfIn PDF document text
    • http://synphabase.ch/upload/file/zuzuwewoxom.pdfIn PDF document text
    • http://congluc.com/upload/files/gakofiboparulugunulajuf.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210903154836996212511.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/naxazax.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/64875023990.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/3n2sd66d0c4clnh8m7inb088p8/73715398794.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/50311697948.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/jikotawipetipazuv.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/59018607839.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/36168517778.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/sepiporikew.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/difiguvaxovu.pdfIn PDF document text
    • https://foulardfotografando.it/file/kajimubik.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafasesajilix.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/73389130365.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/78236766066.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/75087607320.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/fepunozulewili.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391549d4dff---76986582198.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16137a0f06e504---43776884292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=lost+android+devicePDF 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_off0000c15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15A 10340 bytes
SHA-256: af4164288c1c9adc74bdb59c0414b0561921fc5fb4b2daeabefe5db9592e025d
font_01_sfnt_off0000d8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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