Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5db5d022131b3f8…

MALICIOUS

PDF

68.2 KB Created: 2021-03-24 06:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f54ddee1cb5b62b8a42c00c5ecbc5afd SHA-1: 672d6f58d8bf64980c5d800f3be021d075b5249e SHA-256: e5db5d022131b3f8ab8d0ef703cf9d04d90fe6da214c40d082afb0f83a974298
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/award?keyword=cambridge+english+advanced+2+authentic+examination+papers+pdf PDF link annotation
    • http://5-euro.info/maax_spas_jobs5u5ry.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/w9BVqja/88898258220.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/biKijhe/gangmaster_telugu_songs_video.pdfIn PDF document text
    • http://santecmb-sarl.com/5796470920nqipe.pdfIn PDF document text
    • http://ig-copyrightnotice.com/stihl_024_av_electronic_quickstopfzm5p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/ravevuninogabikazuvamik.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/how_to_measure_organisational_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14012f9d-98e4-449a-af67-f55677acc236/johann_wolfgang_goethe_theory_of_colours.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_2b2c1badf31e4b94a921ce8c04bac356.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_dc6455e950814953b578fceb6d5987e9.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_f24184db97aa43ed8016100132dd64d2.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_2cd4b91682bc42d7bb5210d2967bec0e.pdf?index=trueIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_d0ad8374d1744e23a5293da56528e02f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5a0ea5-b8c3-47cb-941f-e3036d69e400/why_is_my_ge_dishwasher_not_drying.pdfIn PDF document text
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_a1834767725648a9a70ac023891168ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/rulatokimurimipozutuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/inkscape_ai_files_convert.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/pamphlet_template_online_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC68 5876 bytes
SHA-256: 4416ce6364da2f7773b2a3e44559e00f025ed887c039ff6a7d9d0edfaec0bcc7
font_01_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 10200 bytes
SHA-256: 583b0c1f9318d6e5557b43c4654d659d17d176bc9401dddfae784dc8084e53d2

Open this report in the interactive analyzer, or submit your own file for analysis.