Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aee6c4f55b9ab41…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 11:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f1a1bce79230217cfed2683dede4284d SHA-1: d6b8d4890b8e3b070a2f8392752024fa004a074f SHA-256: 2aee6c4f55b9ab41d2966765f1042825cecc5ea0b148d999d26f1b4d1d7054c4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a lure related to ring sizing, directing users to a suspicious URL. Heuristics indicate the presence of external URIs and a potential command execution vector. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://baarspo.ru/123?utm_term=how+to+figure+out+your+ring+size+in+inches PDF link annotation
    • https://cdn.sqhk.co/javufikari/RQiCCOx/siren_head_vs_cartoon_cat_rap_battle_reaction.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/lIxZgct/25469130375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6020d2351697a.pdfIn PDF document text
    • http://jemofukamuwol.22web.org/64081929433.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/jFZhct2/bella_fashion_design_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/J9DRthi/filowoni.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/ihYZidN/best_pc_games_free_download_multiplayer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5ff2d2570b889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5ff395e4919a9.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/pasawexawinogad/fowokurefabokesifegom.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/dasota.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/countif_range_on_another_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/circumference_of_circle_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/wakaluwozed.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/membobol_wifi_dengan_cmd_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/ralilaxi.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/bovolukipifovadefogodi.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
    • https://s3.amazonaws.com/sogovekevi/ralilaxiIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5104 bytes
SHA-256: 83e545674b29b86ecfa373ac9bdfc9bc0b306e91aaed1cf789641c8c5362d0d5
font_01_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 10412 bytes
SHA-256: 2d5e70303003b150e1ded457cfe171f2119c3796119971bb993461f2744af018

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