Malicious PDF — malware analysis report

Static analysis result for SHA-256 839b73fa9178939b…

MALICIOUS

PDF

220.7 KB Created: 2021-07-25 22:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 437d7beb4e36d72c45f7a47502955899 SHA-1: eebda26d296cb34ee1234fd60fdd9a52c15ac9fc SHA-256: 839b73fa9178939baa82952544aba507c7388fed0247dcb151c0920275b3ba07
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

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 0.7061

Heuristics 4

  • 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.
  • 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 http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fee2ee39e---56953142564.pdf In PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e6681e8a6---sazufas.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/66608013413.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/wojizadeviberodonot.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qq0vjb20terrnce6uolfdlnt54/vivetil.pdfIn PDF document text
    • http://debden.org/userfiles/file/62173154036.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d972ba9d1c0---misuzejowuzadefevawegi.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ce416cd2f---33030333422.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f2cbafc1f7f6306b592d96f73a679ef4/tusarumak.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/15709820082.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/091fca7536fcd249d27fc5bd8901801d/sugazozimejolore.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/c2860dab89d44fea5b2968590f0b3e86/saxorimowazozowa.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/3lq6vg3iri2r0o75ev6ghe1r1e/letabu.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/64483645143.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3a9a2b179---modogipusolidulivalimax.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984cb4ee62b---fizutewusanewuku.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074215755edf---pivupitubeb.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4decfe6d45c97c7ce260927fd4067d99/xopumesivutejivajugijo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16074b60934329---fuvokenodirebalawis.pdfIn PDF document text
    • https://lemanssrl.it/file/32632387562.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/04e280d2aa05ea942fb47e981b1e2980/55804006098.pdfIn PDF document text
    • http://01host.ru/userfiles/files/nijalemujadat.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/ximikojukobufikoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=nursing+referee+report+templatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000338af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000350c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350C6 10776 bytes
SHA-256: 273c69baaf6e103940392e794e2090c9d19e78eac07af1fcd1dd3b2bfe0f97ff

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