Malicious PDF — malware analysis report

Static analysis result for SHA-256 c963f263c31369ca…

MALICIOUS

PDF

78.0 KB Created: 2021-08-31 23:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14120b5c239f47704921332287eb5bf9 SHA-1: 4d944db4331df8e4c43b1ad6d8e2f7253e857a9d SHA-256: c963f263c31369ca89c02803007ce031e23c0846f12f512853d5d18fc08a4844
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external domains, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6292

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://africanresearchcenter.com/userfiles/file/rimawuwupib.pdf In PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117629f1bfc6---58129652589.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/lipisareb.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/60963044268.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/se4p6ds178ms6vmijaldrsvasl/61000004500.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1076dce3a---97124109945.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/79124735171.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/zokinumikivojejavam.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/24477992954.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/mogavosometobefegugo.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/pegovutikax.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/57644715194.pdfIn PDF document text
    • http://moristas.com/userfiles/files/33139107674.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/putopubejuxoxugexikokuno.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/dokijotomaje.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/13167458222.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/68988828091.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/sigiwalune.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/migowegukojotenalimar.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/juwovugez.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/jiminenowan.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/59708287305.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/mijibutibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=types+of+forgeriesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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