Malicious PDF — malware analysis report

Static analysis result for SHA-256 1063422e325b7d6d…

MALICIOUS

PDF

66.5 KB Created: 2021-09-19 12:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 047a38fcc5a25aa794eb7bc641048d71 SHA-1: 78694cdffcdcba0c18e456ebea0bfc1aab921a71 SHA-256: 1063422e325b7d6d3df9092dfc82d66000935d8721b4949c6327ba0ab4f5cc9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs, such as http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16136d08d847a2---xofazejewadanutidebeb.pdf, are likely intended to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7446

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
  • 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://erbaytag.com/resimler/files/lekemajedogil.pdf In PDF document text
    • https://shellserva.nl/docs/Image/file/43241100806.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/73208950992.pdfIn PDF document text
    • http://goldmustang.com/files/files/jisegef.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/57396016930.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/80675834480.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/oem6058i7g7om28n671rkg64er/jufow.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///19553448738.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/zubul.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/mibitopixore.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210908_845EB516FFE8CEAC.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/61842978694.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/16818006651.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413100d6683---dezina.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/30382419683.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16136d08d847a2---xofazejewadanutidebeb.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/44237072885.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/21975006543.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/75188446049.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/poxivinej.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/96891972152.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/c0c38149e4779b3cd7bd24c86b47b0ff/1262212022.pdfIn PDF document text
    • http://chromavials.com/d/files/27353273361.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/68521897171.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/bidifam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=idm+crack+2020+downloadPDF 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_off0000ce2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2E 10412 bytes
SHA-256: fc6e91475ad14b273c531c395c60375f1b9d621b08f3a63c98ff0a2cc113effd
font_01_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 16692 bytes
SHA-256: 77a1232d74ca7be3a045b22c6a92278ab1818d4ebf44637746cf04f9587e3c58

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