Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ec12230301bcf1…

MALICIOUS

PDF

84.8 KB Created: 2021-07-04 18:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: deb3177b327c742ced2e1b5742651fb2 SHA-1: 2f05c788ee46332a86f368644bd1d33e8c4d6e23 SHA-256: 50ec12230301bcf11f1936e46ebf41fe4eb90a6173a4fa497f7f3617ee4d80da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7768

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://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/9741k2grohnk64jbiq04246grg/85157597918.pdf In PDF document text
    • https://towa-aaa.jp/userfiles/file/20744873295.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608239cef303b---makabubopezebalatatawu.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/93501822613.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097ee39bc61e---varinore.pdfIn PDF document text
    • https://megashina24.ru/files/files/9542719563.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f4c5338f48979e2ee8ad45012568ddd7/metosuwupo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/45739624853.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a55dc6d9c---62257521696.pdfIn PDF document text
    • http://wernitznigg.at/files/zijipazazelez.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/a0af513c16b712ca7b2835f00b5b8f31/bigomutikogus.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210627234456.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/jagimudugesuwozu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7hbi71fbnodo4kk6hcabcfvam6/pixokiwadap.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/plte0rr5bujku4ho74ht8qicf2/xasetaganuvikonile.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75269684ba---kotosozuzitopovaxasodu.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/vesetejikugaketalawixerij.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/l30og0asni5jnog05bp0i1l9dq/pusit.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/b0ab61368f67feda816e87df8d6e1430/zukudanexuwu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/tv6rkso5s0jfuink05a7kd00cq/78186471084.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/kobotipavavuzimu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/70a670c8c5431eb78c12adc4ed7dbaa1/68173017716.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/pa3phs713ghqg9s9u4mim7eib6/49997324399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=organelle+found+in+both+prokaryotic+and+eukaryotic+cellsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_01_sfnt_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 17600 bytes
SHA-256: 37d7079686a74493c2c7a3d4f08ebf5daacb70ac2edaaa32992c3f603a14c011
font_02_sfnt_off00012353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12353 11372 bytes
SHA-256: 8bd106ea6e622e98f99331373727133bc8e3c75199ec7b5c26d71895f9492af9
font_03_sfnt_off00013dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1