Malicious PDF — malware analysis report

Static analysis result for SHA-256 552fed994f3a3982…

MALICIOUS

PDF

84.9 KB Created: 2021-04-01 12:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f53c667ffbf973c9d0a0362bf6eda5 SHA-1: 7bc42a822c4abbcc6bdfea0a6f1580f075cc17a1 SHA-256: 552fed994f3a3982f3fae52e350021693f9781c96439b05c30f00a34a97558db
104 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and a visual download button lure, suggesting a phishing attempt. The embedded URL points to a domain associated with malware distribution. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

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
  • 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://resalured.ru/award?keyword=bteb+hsc+exam+routine+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4489730/normal_602a84e6dce3e.pdf
    • http://amorexpo.com/irobot_roomba_robot_vacuum_reviews1ijjx.pdf
    • https://xidekazepo.weebly.com/uploads/1/3/0/9/130969591/kisadigure-wowobumalugub-jaxefapuv-filaporefimo.pdf
    • https://static.s123-cdn-static.com/uploads/4386837/normal_5fef641122b01.pdf
    • https://miraxinarenipu.weebly.com/uploads/1/3/5/9/135963033/kagilofix.pdf
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5febd053f3df9.pdf
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5fff2e0d23325.pdf
    • http://mmmuuuue.space/sales_presentation_scriptf0q6d.pdf
    • http://hookup750.website/sojemutilemabe03b2z.pdf
    • https://kusejibetejoxer.weebly.com/uploads/1/3/4/7/134749151/423859.pdf
    • https://cdn-cms.f-static.net/uploads/4498978/normal_60178770278a7.pdf
    • http://asta-stroy.ru/biwijesanozuko6j8ym.pdf
    • http://meriline.store/zizezewafuzycl9d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1566b39b-332d-444f-891a-4cf62d8a9c77/depth_of_knowledge_wheel_math.pdf
    • https://uploads.strikinglycdn.com/files/ca131a2b-c4a0-45f1-8e61-e4970776ccfc/ingenuity_convertme_swing-2-seat_portable_swing_assembly.pdf
    • https://uploads.strikinglycdn.com/files/947a924f-f844-4e64-b67e-450749376b57/duvepuxireranefifad.pdf
    • https://uploads.strikinglycdn.com/files/3237d28f-de0b-4d28-b439-a4b736322c12/what_is_the_purpose_of_six_sigma_methodology.pdf
    • https://uploads.strikinglycdn.com/files/ca192d6d-760f-44c8-99a5-d11d7c282e3b/21514094385.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea49.bin
53edd52fa63b6831c97e7fcdd33ad6a50f5ba707c08aeff4ae4509b5b783937f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 5892 bytes
font_01_sfnt_off0000fe30.bin
3512593c8d918db8422330ba9c42b43e747eedf1ec62b156c62b7553fc4aba20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 11212 bytes
font_02_sfnt_off00012110.bin
ff63cf570d1d2fd9bbad6551083da959fec49e30243628663853f9ad18e0013b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 10856 bytes

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