Malicious PDF — malware analysis report

Static analysis result for SHA-256 028b2a696a3b7c5e…

MALICIOUS

PDF

62.6 KB Created: 2021-06-26 03:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ac75bf1a932599faef9fb00299aa3e18 SHA-1: 6a9e364fe2c1d18245c2f20b047d393b35fd13c6 SHA-256: 028b2a696a3b7c5e42dd16142b016780dff86286fd4c49ca1ccd6551bfde9e40
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 an ML classifier, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests the document is intended to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6852

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 https://huntic.ru/uplcv?utm_term=adf+test+results PDF link annotation
    • https://mn-lawfirm.com/box/userfiles/file/76265225728.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a776bdc4f0c---32906848172.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/r0mq6rcb77s1jshuuk7gdrbash/23952546234.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a154e6a8a6c---kawurug.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/gejunelodedozisi.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/25591770940.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676af4dc68---xibisux.pdfIn PDF document text
    • https://inncredel.com/uploads/60309727115.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fa01ed0a---8551403358.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/nenuwikerinepoxamebezi.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b1ab69c1c---kogubebazevo.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c72222b3586---47629827659.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160832ed1f1b0a---75741824741.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/xodoz.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/c1p4tk4kbru27m07eruafl731o/tiruxituvi.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/likekelogawomavowasi.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160831c508e58f---71045891844.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0eb8e83fc---jarozubaw.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/29852336441.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5uae41q2gve4egkhl95i10ud1/29541812786.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64e918fbd8---gemumo.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/dobijujil.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c557371e474---29649398006.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/615f60d185dba6dd4f08b478039edea5/mazikurumubokinev.pdfIn PDF document text
    • 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_off0000b68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68F 14888 bytes
SHA-256: 8d7f9b00b84b6d9cd052c12c3f185f610bc3aa64bb995b185a68e7e2dd3f37b2
font_01_sfnt_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 9948 bytes
SHA-256: fe456d0c889d7d7e650dc38a8827d55cb0d4c81d4ef959ec1c945b718f87563b