Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c652aef4ac6471…

MALICIOUS

PDF

62.3 KB Created: 2021-09-28 04:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f51bd234bc32b9f1009cf53405e2d3d4 SHA-1: a90a8f50be4855d94f18b5057a5f6ff5e62da4b4 SHA-256: 14c652aef4ac6471cca65d2eba58ab2f4dd2753d2c9afa7a2173de2c76dbffc3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for malicious PDFs to execute actions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF redirects to a large number of distinct hosts, suggesting a link farm designed to obscure the ultimate destination. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further supports a malicious classification, likely phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3678

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pradakshinam.com/fck_uploads/file/murimipu.pdf In PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/7937084720.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/61022788068.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/funuwifizalim.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/20950929009.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/30114899617.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/22683480770.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/98221136261.pdfIn PDF document text
    • https://porfic.com/fotos/file/rirutojonaziver.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/15478676828.pdfIn PDF document text
    • https://blv.by/upload/editor/files/58776522152.pdfIn PDF document text
    • http://potya.com/taxikunebokuwovivafofaver.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/47339490076.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/2395502156.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/pusuvavulitezig.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/bexesegim.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/xeferu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/39888cd6b7bf50334abcf5b4870a5054/23472709526.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/wuxoruzodulutisa.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/28248305957.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/magumezab.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/tezejekajak.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161434ac4f3dd8---jokagujivamubit.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/78621155441.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210916162948.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36990057743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=diabetes+and+dizzinessPDF 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_off0000b378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8F 10176 bytes
SHA-256: 87efebb86529f254c4612f9b430ca584a731d5c8d5fb9fd4359a76dec004ef21