Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2ec0675c78cb69…

MALICIOUS

PDF

71.5 KB Created: 2021-10-01 21:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 44682038ac4b229f5432f4d93d1d6530 SHA-1: 136b7146acd8b1e0f82cf9438e93f248b5f65fdb SHA-256: 8f2ec0675c78cb69374192b1ba351465bc5eff26f919f740daa0b24764db0e5f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, 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. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=6+from+high+and+low+the+worst+full+movie PDF link annotation
    • https://gadesign52.com/uploads/files/202109050856157580.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/73976143027.pdfIn PDF document text
    • https://landi-bg.com/images/file/sizapuxusamazifedejigera.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614428cae975c---52664845344.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16157352365d89---dosuxulewixodinon.pdfIn PDF document text
    • https://defi128.com/userfiles/files/92830728370.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/rugalaminawu.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/mazutebitefi.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/gcc8tohvgni79j6s70tl1aagh3/81127797244.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/49542469524.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/lagapusatadigulepofeniv.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/36ee82ebd2cd3a08e15ade99372ba031/pudiduxasuxavonagubitip.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/84628420666.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/bafobetu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16151a87b0ebb2---43537108394.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/mokizipor.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/kikumilatilap.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/dojajabinizunigevavetigo.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/70574025165.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/56036711687.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/29962143688.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16327984021872.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/pijadarija.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/68536785235.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/17602520106.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/gijomegewod.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_off0000b3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E2 11124 bytes
SHA-256: a0786457e0a67824b46848f24f9bcdfde9e4bcccf35d0671fcb40b33bf52f1ba
font_01_sfnt_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 16744 bytes
SHA-256: 0825cdde6746e80144efc1e092d2381fcb3e6fc6b659d688d5aa9c1596a513a9

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