Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be98ada39ed5540…

MALICIOUS

PDF

80.2 KB Created: 2021-09-05 03:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a96a1f4c11628913e2970d41534c15b SHA-1: eb240a6056dad62d9b47d1dd169592b1c19b6702 SHA-256: 9be98ada39ed5540173a748fcffc517c6ecfbad12448502a29080498b5336146
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs suggests the PDF is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=pdf+to+word+converter+pro+apple PDF link annotation
    • http://ekonopuntos.com/campannas/file/zemos.pdfIn PDF document text
    • http://bjjiffy.com/upload/neremawusanakisiti.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d553e04b2eb---2717586065.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/7bf3c31c03bf7386bcf8f5fcda251fd6/9079645424.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/53196459116.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/xipovogipi.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/30035853230.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/vokamewi.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089aad39e8e3---71098167275.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/buwokomelopovafexa.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14cc678f24---67052474393.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb956e24680---43929516692.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/66287129243.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/voxebegexomebi.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/dasozesojabixefawilin.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/62149271970.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2af0e92b5---84061407553.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/iqv6mqv6ff330a4lmk6l61pdto/48471224689.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7db34210f4---gokivizomekitufomomujogol.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/matedadofoxenupuj.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/zamipolufop.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_off0000d28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 18796 bytes
SHA-256: ed243cf336d2c344a8d0e74c00f83bbd78a7d385ea054a8416bb21259d30f2d2
font_02_sfnt_off00011b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7E 10508 bytes
SHA-256: 4972ce82d491a06c6fa05278e06fad94e45b5dceb726f46fd5d8ecf5222a6b52