Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ac29b7faac7d6e…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 22:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98953ddd29a2b71c972663652b75edc1 SHA-1: 18dd0d375ffbe13907df0dd75f41516779ac0a30 SHA-256: 66ac29b7faac7d6e43372e131c48e9b4c7fd0d563d2a81e84e28e7df6dc984ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cructi.ru/uplcv?utm_term=sudden+profuse+sweating+and+nausea PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dd57547a0---37314207140.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/39e80ae17285b529f8669ca0ffc868e1/34804195292.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/523843846.pdfIn PDF document text
    • http://jucal.es/images/file/69465283609.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/397ee7f1a2c397407f275d3cae67ff33/29312190248.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/53574210480.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc0b45f11---firixotituw.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cbabd3b5eac---62535419901.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/xugidavoti.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087e875772bf---gozas.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/nupejov.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc66139c59---28457823966.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/87461861492.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/1art1rtnbudts24os28bk81kbd/80295216689.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/78b660fe586c5e2ff2030a9ceb873e9d/58739135343.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/41105046646.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987caf601e4---68317195134.pdfIn PDF document text
    • https://xistenze.com/files/files/53504534329.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096d33906ca3---93049035722.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e7919b50c---miseferegetubiro.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56b792e8e---ravejiserurematinefubed.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/dusogiw.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/sorasevexosu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 17620 bytes
SHA-256: 049b188c19b7b51de8c0e17631a5ca46d9ac729431c05585360c5ab93e96eb08
font_02_sfnt_off00013f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F63 10888 bytes
SHA-256: f3ec48f9f471defb4505e58530cfde59dcfe88f8697dc4ae8d14ef105cbe2f39

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