Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f530000e369839…

MALICIOUS

PDF

74.5 KB Created: 2021-04-29 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e62b9439c83ec0f73978c351834b2eaa SHA-1: 67018da60f9b527af7374c9967d58dd63392874a SHA-256: 25f530000e3698399f4a8315b8ebb72afa7b69c119cea6a1ee761c8f41234b4d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are associated with SEO link farms, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=rel%25C3%25B3gio+g-shock+rangeman+gw-9400-3dr PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382614/normal_604ce24ba2d44.pdfIn PDF document text
    • http://xasanefajisa.sportsontheweb.net/jetiguviginomonufuwumome.pdfIn PDF document text
    • http://lafarupikawa.22web.org/autonomy_in_nursing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379377/normal_5ff56a81aeace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_602791eade37a.pdfIn PDF document text
    • http://jubobusuzamap.22web.org/hokkaido_road_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guxejusoselota.myartsonline.com/bibadoxela.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/6679810305.pdfIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_5ab896576da244d88a8d54da77830e79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudowo/66867239486.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/15987888716.pdfIn PDF document text
    • http://silinodev.rf.gd/how_to_program_dish_remote_to_receiver.pdfIn PDF document text
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_e31edb707f0e474599225afe6dbb9c8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/gizoferadenafanar.pdfIn PDF document text
    • http://fuvuxejuv.myartsonline.com/13381977641.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/kozadosunagujirik.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/44480755976.pdfIn PDF document text
    • http://nalezedos.rf.gd/vofodidebajukinoxez.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 6232 bytes
SHA-256: 260b7b6a91e7db61aa21dbd8fcd18724fa7e335332aefb38ee83c1285b0e5d4e
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 12764 bytes
SHA-256: 2ed4b9ff75c154da87a5cb6fafa81597cf5c7eb546b723717734562af705493b

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