Malicious PDF — malware analysis report

Static analysis result for SHA-256 184f1cf19674b391…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 11:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e462a0c9636719b4861f61a3a2629a SHA-1: dcd9dc894cedf7fa8c2a96b5604a64a09f141f25 SHA-256: 184f1cf19674b39140c47ebe91441e10f23d6c29ac464d2c30b150d3f2ab5d7d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user interaction to navigate to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=chms+computer+lab+links
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60201966c8a39.pdf
    • https://cdn-cms.f-static.net/uploads/4450141/normal_605c86407c750.pdf
    • http://bitsracing.net/mechanical_engineer_role_in_construction_sitepxdo6.pdf
    • http://haustova.com/area_and_perimeter_anchor_chartuopc9.pdf
    • http://hookup154.online/samujagivudepap1pssj.pdf
    • http://avbox.org/kuvurelelaxegav0jbq.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_604ceba5c553f.pdf
    • https://cdn-cms.f-static.net/uploads/4490121/normal_600faa1a77278.pdf
    • https://static.s123-cdn-static.com/uploads/4491159/normal_5fcb3769b88a7.pdf
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5fddbc83b3936.pdf
    • http://gufutaca6.xyz/84187951314skddf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tupofelasujewas/44420785795.pdf
    • https://s3.amazonaws.com/pajukovuxetu/rofibexogadagu.pdf
    • https://s3.amazonaws.com/vufuzewasi/good_morning_beautiful_whatsapp_status_video.pdf
    • http://vedixemalirugi.atwebpages.com/aeration_wastewater_treatment.pdf
    • https://s3.amazonaws.com/widuxade/27384274593.pdf
    • https://s3.amazonaws.com/jemisajoda/medudimigukemopo.pdf
    • https://s3.amazonaws.com/nigimul/62661529843.pdf
    • https://s3.amazonaws.com/xutomoxu/dka_management_guidelines_sri_lanka.pdf
    • https://s3.amazonaws.com/pozokimepe/an_introduction_to_language_10th_edition_answer.pdf
    • https://s3.amazonaws.com/lizuseguwix/wordpress_blog_tutorial_2020.pdf
    • https://s3.amazonaws.com/timeziso/biludefuf.pdf
    • http://dojorunubi.myartsonline.com/fun_math_worksheets_4th_grade.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e275.bin
7d875eaff501259eba63b687e54486f8856ab615a8c48ca77b049de2fcbfb535		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5280 bytes
font_01_sfnt_off0000f435.bin
b178f8ff4fd566a9ece16239af51f98417c75736c51fa58a941fd54843da0c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 11540 bytes
font_02_sfnt_off00011b86.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 16204 bytes

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