Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e32778738a44c2f…

MALICIOUS

PDF

88.5 KB Created: 2021-06-21 17:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c15f430bcb90a620f8c77b1d078f6821 SHA-1: d15b29dd5ef6ce6ef887162291887d16e1cb67cd SHA-256: 1e32778738a44c2f18e5f9c52967086a137ec13f4b4e8dcb31906d716ebc2942
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9760

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://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b2b8f2cd1---51344104087.pdf In PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/vae6d13j44meja71mt0tel2qp9/97451539460.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/gazududimedidajemojok.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4e9bcae0167585d5314fe126b80b7ee9/80322450780.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/v6qln02qn8qbqvtbqeatmdcc6p/78519749216.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/jixexatifefirevo.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083679282935---nemopevifejawamoxotaseta.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c9cf8e507114488969c42e63a27dd3d6/56651954922.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074335ca1db7---xogan.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/zuwirujilojuwan.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160760db3656da---11379719195.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/66401277477.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7e9e3633---woxewusure.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd87de7c4dd524702b3506dd4a3cba4d/bulifanokisutojagej.pdfIn PDF document text
    • https://tepihtrava.rs//files/waloxiguru.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/wedekiguvebararaxodufuduk.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f419621d---tugagakarazimes.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/9e8a8dead8a34bb88dabfe2623242f95/livatokugadurugisupuxa.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/zolotoxili.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=intelligent+transport+system+seminar+report+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F93 5188 bytes
SHA-256: 33a6cce9a7aeaca42c4d1ec369c229333f39120844d3ffe47f28c92ffecd62d7

Open this report in the interactive analyzer, or submit your own file for analysis.