Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaa559ac23d06ea…

MALICIOUS

PDF

71.6 KB Created: 2021-07-02 19:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d3721039376b20418fd27eee5b4777ba SHA-1: ab24e6d9583f0177a04b3211337d68e4cddd1d70 SHA-256: 4aaa559ac23d06ea8c87eadc0f162923d8c85b10f745262c9ba013b51f833872
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely serving as a distribution point for further malicious content. The presence of external URI heuristics and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6366

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://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aca934ff54---tisopaxabekepifaw.pdf In PDF document text
    • http://aostavet.it/userfiles/files/xisusobazezug.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a39cbdc94---viwez.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/54397672485.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b6330b75d---kinubumawajolalu.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///57521587971.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/0739448a68f9c46877d9c8af0f6d5103/gamunerakeparurugon.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/62345217317.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/91753552373.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/mjdnb0sj38rvugj0goab5nni57/11938576201.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/84897397520.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/nunepimekuguvopuzede.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b9f4858a---rubuletoroke.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/uaqf5nevh5lhtqsm2vd29hup09/begoxinonexowijuzoxot.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/fq6l7llm6n4chqn1q0m2q7s8ci/panot.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f93f3e5c1---43373382993.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/tunaferasuninamapumis.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbe86053a5---zamopajuduwaberadaz.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/1sese9v3dihtgs01hhc3ii5vdg/tabip.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/wumol.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/zetozopipijogixela.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/2430898907.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160890bf6d280c---zosoraniwibilelejaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=words+that+start+with+y+to+describe+a+personPDF 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_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 10900 bytes
SHA-256: d135d6ce2d736e8d4097820a3eeabe93c6eb4684e0e2fe56e456fc22fd7dd6a2

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