Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee73471d9fa6130…

MALICIOUS

PDF

84.4 KB Created: 2021-02-19 01:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e62ebf2d5d7509dc7e186bb8bb961f73 SHA-1: e0c0c0ca84cb3081e356f2b954526387658e1dd3 SHA-256: fee73471d9fa6130f477475d0eb000e6c4dfc96b3d0f295a3595834f6b0786c1
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to potentially malicious sites, and the document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/123?utm_term=dyson+dc25+take+apart PDF link annotation
    • https://cdn.sqhk.co/kubarevopew/ibLlgif/scary_clown_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/ij7ijhc/superstar_life_play_online.pdfIn PDF document text
    • http://tihefers.online/eclipse_c_linuxo8zcz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5feeb6c849251.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/mlcW0ij/moto_bike_racing_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/L3v9ahi/5071701927.pdfIn PDF document text
    • http://italylife.pro/pokemon_go_map_tampavtquk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_6002f1098ad17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_6015bd6525d61.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/OIXRQha/zurorusem.pdfIn PDF document text
    • http://salea.site/tusopexalaw3adjh.pdfIn PDF document text
    • http://cybety.xyz/android_9_tv_box2i9r7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_6021520db7075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424637/normal_5fcb102185b9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_5fefdf8d95b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fe9dc9c097ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 5196 bytes
SHA-256: 24ca9a29d91b2f9ef2f513a6ab2deea3ef082b0e0dc36062a14ec5f93ea6f8c1
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 10560 bytes
SHA-256: 2c8a33946036c8aa4295c883350cf980a70689490dafb0f1efac3fd87ddd163b
font_03_sfnt_off0001362f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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