Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8e3918b23ebf30…

MALICIOUS

PDF

85.7 KB Created: 2021-09-24 06:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 18c4d3ada8bda5f0746b0a79e307ddf5 SHA-1: 95d5d8221ee3667fb9c1911b6ef34d7d75388b68 SHA-256: eb8e3918b23ebf305d7a86dcdff0648f6590378b950f57b6daec264913dbd5ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic firings indicate a link farm designed to redirect users to potentially malicious content, with one URL specifically mentioning 'download s20 launcher pro apk'. ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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
  • 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://irlanc.ru/uplcv?utm_term=download+s20+launcher+pro+apk PDF link annotation
    • http://artgraf24.pl/userfiles/file/xalelapopagopilu.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/7513973162.pdfIn PDF document text
    • https://energooptima.hu/upload/File/kifisojezukusaxitamekevo.pdfIn PDF document text
    • http://ashioke.com/images/library/File/74216868997.pdfIn PDF document text
    • https://vientangluc.com/upload/files/panelobam.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109221227126023.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/44281911493.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/42679108423.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/buvavuvomebobibekoxij.pdfIn PDF document text
    • https://dm288.com/slicice/file/76028181532.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/35580432621.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614828922d3e5---26864193006.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/bafifadab.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f07fa4257---jinoked.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/2489032115.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210916013534.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/xewuwexibigudubikisabon.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/gurunuvepegenoriji.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/jexobarepufezida.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614054cfac2f3---kanoraxobimidoxa.pdfIn PDF document text
    • http://packamate.com/userfiles/31513509419.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/78403143617.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/fibuwudarakozu.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/fegodivaferupavenemituf.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/dijarimoxozisimusixudev.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/78771576197.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_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 19220 bytes
SHA-256: f3f569fc7aca12a214e0d9c8d9adf2bd52011aadfad9ffa8dba8cdcb44f7e925
font_02_sfnt_off00012f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5A 10940 bytes
SHA-256: 3eb415d32e39c1d4f685192d9498bdb2523b4ecda4d8b2fe296efffb0153878d

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