Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49e9672a58f4b0b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 21:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf9c506ea3499feee5d98e8e1f3b69d3 SHA-1: b58726f73bc9a294a38a9b682ae1604631041329 SHA-256: c49e9672a58f4b0b16bc2424d5793505606230e420888684ed586658d9dced89
154 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDFs hosted on compromised websites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern involves luring users through a potentially spearphished document to click on these links, leading them to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

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 http://www.insight-assessment.com/ckfinder/userfiles/files/84312034155.pdf In PDF document text
    • https://hotelindigha.com/FCKeditor/file/64622510243.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/6tl70uh6i1ia0ta56opq5bdvus/563254722.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/67cc5c28aa0f36c5d846118c001415b7/siwezifazoxosojujewusi.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608893cf48867---27196904321.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091898d7df78---18184191319.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/6f704fc0550868c1cab44d1b85a00202/rugedugukalukubu.pdfIn PDF document text
    • http://linza-market.ru/upload/files/89407523528.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/99069379323.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160de67113c34f---14443883113.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/2107244976.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a83e8738e---97433251726.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/wozobezu.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/vozitolepigajupawanilu.pdfIn PDF document text
    • http://blueyee.com/upload/file/221505454657.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/poxulimigenowuzo.pdfIn PDF document text
    • https://sce.tw/uploads/files/60ba104183986.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/penobujokemolutaw.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/13285880004.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/54s50sm9mfmqeaqk53hb0q49q1/58882447169.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202108231101421756.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/dovofagoxumofijuramusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=bringing+out+the+best+in+others+pdfPDF 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_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001185d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185D 10860 bytes
SHA-256: c742fd5e57a5cd5a58cbe5a244ae6710104eb7f8a93f6baa49bfdf05044ec927

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