Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26d449b3450fb33…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 23:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b21b379c9ee4b3ba0c924c55f9aeac93 SHA-1: 2a43896441d67e0ca0876e78c1847c7fe63dfd51 SHA-256: a26d449b3450fb3389f2eaad1f666c6446a446e8dfdecbd1143d6872e5973cec
156 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into providing recovery phrases or private keys. The embedded URL, https://pelibifir.ru/strik?utm_term=sentry+safe+will+not+unlock+with+key, likely serves as the destination for this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://pelibifir.ru/strik?utm_term=sentry+safe+will+not+unlock+with+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5fd203aa614e3.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/gghLtgg/strategic_management_process_model.pdfIn PDF document text
    • https://cdn.sqhk.co/luwanuriwaba/bgegiji/ground_state_electron_configuration_of_calcium_ion.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/JZa84hj/81139322691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_605985b4036d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ff61836202a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461216/normal_6004ab40b5377.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/jhQmxrn/chess_rules_king_queen_swap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5fe007b3e3181.pdfIn PDF document text
    • http://sakuravaju.iblogger.org/diwobumiwuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/gi6hhFc/hero_rescue_puzzle_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gcxvdir/puwonexu.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/ajgia7o/zudemutupebixemunuzezezif.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/Thh1bM3/82823502700.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/jgdhhge/pepired.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/jepinebawo/limits_worksheet_graphs.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/96884923485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab117c2-0b87-421f-aaf5-8a498b3f010e/how_to_be_a_gentleman_book_download_text.pdfIn PDF document text
    • http://gonesipida.epizy.com/bopenuxabosogixevetadib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7efc194-85fd-42aa-a0e8-b615f9953e20/zmodo_ip_camera_default_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce106c4c-08da-49e5-a495-b8933b84ffd5/95117393786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52098524-b18c-45c2-861e-472d09bee968/zagg_folio_for_ipad_pro_9.7_backlit.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_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 5332 bytes
SHA-256: 9867b9c29059d571136f6d631736d9c51b1e278ab79fdb0a97e2adfae3ae9692
font_01_sfnt_off00010347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10347 11420 bytes
SHA-256: fac94eef40eee5f0fee64993152e4eb6001065dda0b0b691f43bd7a7f9166e54

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