Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76825af5c6e7bc5…

MALICIOUS

PDF

76.4 KB Created: 2021-03-21 23:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6a9fa86cc1071574071b25bc9df8d76 SHA-1: ee4661b92fb9e1d61a2c6e3c4874d571ba3632e4 SHA-256: c76825af5c6e7bc54422818ddbe63756041dd3faf39fd1c3c0e2ecbf68b0e8ee
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs and a heuristic firing for a visual download button, suggesting a social engineering lure. The primary malicious URL identified is https://dafemum.ru/strik. The document's content, though heavily obfuscated, appears to be a lure related to 'how much is simon worth'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+much+is+simon+worth
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fcdd2a61c777.pdf
    • https://static.s123-cdn-static.com/uploads/4468270/normal_5ff59abc4c1a7.pdf
    • http://vifezitenof.getenjoyment.net/bumibilerov.pdf
    • http://rusadezebep.mygamesonline.org/electronics_engineering_books_free_download.pdf
    • http://zitirisiz.mywebcommunity.org/pirinajoguxowiga.pdf
    • http://sibatike.getenjoyment.net/las_batallas_en_el_desierto_de_jos_emilio_pacheco_resumen.pdf
    • https://cdn-cms.f-static.net/uploads/4368999/normal_60312b5077ebe.pdf
    • http://tehnopolis.org/authentic_assessment_methods3qboc.pdf
    • http://copyrightviolationcenters.com/police_report_example_ks2qdar2.pdf
    • http://vezerfa.xyz/69212096287qn9lr.pdf
    • http://zuraleres.mywebcommunity.org/shoei_neotec_2_srl_review.pdf
    • https://cdn-cms.f-static.net/uploads/4474978/normal_60494f8f2461a.pdf
    • http://babysampler.com/77443373922zf1it.pdf
    • http://fisujerekuvij.getenjoyment.net/hifi_corp_south_africa_catalogue.pdf
    • https://cdn-cms.f-static.net/uploads/4374368/normal_60118947f22ec.pdf
    • http://parkingtest.xyz/83123652949qfa2d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/268fda93-93e3-4a28-aac5-970bbc5943ec/sears_sewing_machine_tables.pdf
    • https://uploads.strikinglycdn.com/files/3689a2b4-aff8-496e-aed6-a965a1e0189a/fofodiwabalo.pdf
    • http://bogalibamadom.myartsonline.com/39008334082.pdf
    • https://uploads.strikinglycdn.com/files/cabf0939-52ef-44ea-94ce-693ed1211e97/how_to_change_brush_size_in_photoshop_cs5.pdf
    • https://uploads.strikinglycdn.com/files/020c64f8-0c76-4bdc-8e2d-2f6ab7c9b31c/how_truly_radical_was_radical_reconstruction.pdf
    • https://uploads.strikinglycdn.com/files/fc9c1160-904b-44f6-88b6-09735a2ccc3a/ford_mustang_gt_premium_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/99bc1f78-415a-41b2-88ac-33ebe33b0390/93668180774.pdf
    • https://uploads.strikinglycdn.com/files/4e203d81-d7c6-4f7d-bcb4-5616e1d80f89/xivipenejasuvuridunulelal.pdf
    • https://uploads.strikinglycdn.com/files/d5e698f2-5fd9-4503-b90f-925338e3ff9a/91670209828.pdf
    • https://uploads.strikinglycdn.com/files/239df3b2-1baf-4881-8ff3-f498a0d58ab0/xujukujevomo.pdf
    • 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_off0000edf2.bin
553b0d87a2fb5a389da10704c590a644380cda46718b369e472d454133bf4f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 4852 bytes
font_01_sfnt_off0000fe59.bin
21b509a76ad93121c700194718ed8417028e2e89a1b5d553c32b3a1ef20f9555		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 10676 bytes

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