Malicious PDF — malware analysis report

Static analysis result for SHA-256 6211d4866d4b19d3…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 12:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201aa32aae38c8b36338eebab61a4ccb SHA-1: d051386ffb349665d24c125f4341cb9453a04f2a SHA-256: 6211d4866d4b19d3a3e2c12efc1e1391c91c7f227a0b46da954fb831e4578837
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'binge eating disorder symptoms pdf'. The presence of 'powershell_startupprofiledata-noninteractive.pdf' in the document text hints at potential execution of PowerShell commands, possibly to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ponafet.ru/award?keyword=binge+eating+disorder+symptoms+pdf
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd8213212053.pdf
    • http://bagerisevi.scienceontheweb.net/how_do_i_reset_my_lg_linear_compressor_refrigerator.pdf
    • http://zaxiluxedexu.getenjoyment.net/danza_clasica.pdf
    • http://wow50.pro/how_to_record_installment_sale_on_bookskzhwr.pdf
    • https://cdn-cms.f-static.net/uploads/4412891/normal_60146ec92b6ac.pdf
    • http://idealica-italiaoficial.site/generals_gathered_in_their_masses_star_warso62j3.pdf
    • https://cdn.sqhk.co/surodamiz/0oZibAh/switch_controller_adapter_gamecube.pdf
    • http://teksalon.xyz/78722369291apaml.pdf
    • https://cdn.sqhk.co/kojetovukufo/cpiejft/30562381962.pdf
    • http://fasad-dom.site/mortal_kombat_xl_xbox_one_movesej6wj.pdf
    • http://lojapidabud.mypressonline.com/windows_powershell_startupprofiledata-noninteractive.pdf
    • https://cdn.sqhk.co/vimanagadu/Gxcavhc/is_darker_blood_healthier.pdf
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5fe541692f2d0.pdf
    • https://cdn-cms.f-static.net/uploads/4501037/normal_6044d8020ce23.pdf
    • https://static.s123-cdn-static.com/uploads/4477386/normal_6005303ef410e.pdf
    • http://puveputado.sportsontheweb.net/examples_of_alkanes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/retobifulipo/chennai_express_train_song_dialogues.pdf
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_0d0c14ed7f694a7d883cdc60b49fcce4.pdf?index=true
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_e468d015ccc74e809dba7fbd995169f4.pdf?index=true
    • http://tokozod.myartsonline.com/foberuraf.pdf
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_ff269294e6c5492b8b2aae4f690bcf51.pdf?index=true
    • https://s3.amazonaws.com/pajeriramal/diocletian_s_palace_self_guided_walking_tour.pdf
    • https://s3.amazonaws.com/fupanabivote/mlsu_admission_form.pdf
    • https://s3.amazonaws.com/vavale/majejuvo.pdf
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_7557c142a4f84bf9a52dcf1dc8233de3.pdf?index=true
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_aebd96ed101d44aea0c179c89d04fc36.pdf?index=true
    • 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_off0000f9ed.bin
da173c064819ab60fdf272f41a8d3ddcf1375ecf9c53edebd5c5059b48a6e82a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 5480 bytes
font_01_sfnt_off00010c8c.bin
b8fdbe510998920127766c9a1496d3993274a93408b2b8df6df7d6a31019d504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8C 10472 bytes

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