Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1bf7be00c7ca5b…

MALICIOUS

PDF

79.0 KB Created: 2021-04-24 16:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dabf86d6189bc23553b9ab60bb5640 SHA-1: b9078cf89b700d81e2c70a7465b5fa375de191e6 SHA-256: bf1bf7be00c7ca5b627e963c598ca4ece56fb4b7f80b08dc89fc31d72be73026
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to potentially malicious domains, masquerading as search results for common queries. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=why+is+my+vicks+humidifier+light+red
    • http://hookup157.fun/stihl_019t_parts_diagramrlb1g.pdf
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5fdd79e0c3f3c.pdf
    • http://teenagetutor.net/vivimoxojiw32m1b.pdf
    • https://cdn.sqhk.co/kodivitedi/fibqbWp/fupebokuxavatu.pdf
    • http://myfirstsite.xyz/horizontal_and_vertical_financial_analysis8nk10.pdf
    • http://halfraire.xyz/wanivafilaruwarafatusgbbwo.pdf
    • https://cdn-cms.f-static.net/uploads/4447487/normal_603c5444c974a.pdf
    • http://ukranews.icu/nefaxamasuramunuzupimilov5y5y.pdf
    • https://cdn.sqhk.co/wimedizi/gSLjfph/neon_pink_desktop_backgrounds.pdf
    • https://cdn.sqhk.co/luwesefizi/38SjaBZ/putujojeruwake.pdf
    • http://thehensleys.org/boss_ps-6_vs_hr-2cxhen.pdf
    • http://titanovyi-filtr.ru/67466075223hlksz.pdf
    • https://cdn.sqhk.co/fadejiweruw/jaZacCJ/49904196404.pdf
    • http://esagafow.fun/ruger_mini_14_300_blackout_10_round_magazineykjv4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kiwopusafize/gib_aqualine_guide.pdf
    • https://s3.amazonaws.com/migivewuwe/maze_runner_books_ranked.pdf
    • https://s3.amazonaws.com/goviwigax/ibm_spss_amos_24_user_s_guide.pdf
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_b59e8ad524b64f0092aa9a01a7b14675.pdf?index=true
    • https://s3.amazonaws.com/nuruvapozixix/gaxupolosiger.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/nemesalojerukofilomaderu.pdf
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_d6050e55eb1c4568b32a2ced49f01bf0.pdf?index=true
    • https://efec373b-cb85-4617-95c0-ca1809d574ea.filesusr.com/ugd/9529b1_b8e37dc4226d40c481e2e712dd5cb324.pdf?index=true
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_e68fc9846a124bfd8347c611fe24540d.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_060f69f5fb3a46fbacdc85874e987499.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35c.bin
eafb33fa165b042f83807f934524faad0807d19a5dca24ed33cae6c1e5595a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 5464 bytes
font_01_sfnt_off000105e6.bin
aac033a2e73f76c2ac5682d5ad7fe753558c17819b66553118bab8b92397b6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 11812 bytes

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