Malicious PDF — malware analysis report

Static analysis result for SHA-256 22628da1812ea0da…

MALICIOUS

PDF

69.2 KB Created: 2021-09-04 01:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eda476c830f2b08cf945708390db064b SHA-1: fd8d5e4301cd46b88801a0bdb8cf176e2016ddd0 SHA-256: 22628da1812ea0da96bdb91fefbcb60636497e24d1daaf2dd73b2c19e17d1c1c
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The presence of 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics strongly suggests malicious intent. The ML classifier and ClamAV detection further corroborate the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6772

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://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612b36eadcad2---kefifaxolebelaximawuritu.pdf In PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16116aad456730---36809809292.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/99864228159.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/36720830585.pdfIn PDF document text
    • https://olterus.info/contents//files/29304585249.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c11726b56---87515406492.pdfIn PDF document text
    • http://01host.ru/userfiles/files/51152117735.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f37fe5188d2---24061952514.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4af1f043a---gekodef.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/fitiz.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/66641136872.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/gizevoxowuwejojenali.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d63e67b4---29814883951.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074439bac904---paxinimox.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a853b0cdc7a---lisaluzawuw.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i4rsem3l50j0h4s0qlr9q4a434/49585210356.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/wutinideroxasowekiwewewa.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/11619206721.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b555a6057ee---wudezemorefutogizibej.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/44293215153.pdfIn PDF document text
    • http://abpaluso.com/upload/file/92377046558.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e028895fa---mixupugaxisidapo.pdfIn PDF document text
    • http://rotang.net/userfiles/file/tolonoxixak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=road+map+vietnam+pdfPDF 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_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 10456 bytes
SHA-256: 9ffaad730c6517af8b7f3c848f07f772c69452ccb9501cc38bb6d86c51d6d3c5

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