Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ffb3f912aef3b2…

MALICIOUS

PDF

81.4 KB Created: 2021-03-30 19:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d2651611a947f79287a537bc29cb61 SHA-1: dc877224bd260a626fc2e2a1dc72529d96340984 SHA-256: f3ffb3f912aef3b2f6d59d6f2b850c6a82ce52eb60786e2de0cbe99ad1b91a05
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it uses a browser extension installation lure. The embedded URL `https://nipisod.ru/wix?keyword=single+point+rubric+template+google+doc` likely serves as a redirect to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nipisod.ru/wix?keyword=single+point+rubric+template+google+doc
    • http://cardioactiveuficiale.site/89299080969wj6q.pdf
    • https://cdn.sqhk.co/tibapopedeka/A7idMic/wuwugarusimisuj.pdf
    • http://repair-kvadrokopterov.ru/ajax_get_serialized_form_data_jquery9v4qh.pdf
    • https://cdn-cms.f-static.net/uploads/4473947/normal_60597ff7efda8.pdf
    • https://cdn.sqhk.co/wadelovelo/kicajdw/yandex_browser_apk_4pda.pdf
    • https://cdn-cms.f-static.net/uploads/4454290/normal_60152991c8904.pdf
    • https://cdn-cms.f-static.net/uploads/4451544/normal_6023f2ebadc24.pdf
    • http://verenica.net/gili_air_surf_reportazdqx.pdf
    • https://cdn.sqhk.co/tosuwukiwate/zhfjhgc/gakapo.pdf
    • https://cdn.sqhk.co/rabovafom/iLhfeic/ctls_learn_parent_login.pdf
    • http://verefdliyvtorogo.xyz/amana_tandem_7300_dryer_thermal_fuse_locationj4fbi.pdf
    • http://fortuneo.biz/piguzuziveq839u.pdf
    • https://cdn.sqhk.co/wadupaxi/iMehj4S/luduzerixijutodogimavubuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lanadofebanubod.epizy.com/medicinal_chemistry_books_yogeshwari.pdf
    • http://waviwonagasa.epizy.com/fituketulovivovera.pdf
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_6fd6e639fe8a4952a98c434059033619.pdf?index=true
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_63d34886add4454ea2b84cd8f5167503.pdf?index=true
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_c5ddb334ea9f42daa1da35b46120bd13.pdf?index=true
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_106d7bb86e094611a2d38ae1bf336a57.pdf?index=true
    • http://fusogusobu.epizy.com/ak_47_case_hardened_pattern_guide.pdf
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_cd0f7f5f2c1041c0b70c7c1c798d7c66.pdf?index=true
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_6ae1f260a1514f6299bd72de1d24f901.pdf?index=true
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_f37df32d3daf46d0955bb564b5696aae.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
    • 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_off0000eab5.bin
3ed944d256e0476d67abb0f21b6842d4c6ec76d9307a0ad8da057ee94f1dde0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 5456 bytes
font_01_sfnt_off0000fd24.bin
4ecce54a17703a205c605a0cb2cddd17f89cf45779dec9710b4e4e6c9f8515eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 11088 bytes
font_02_sfnt_off000122aa.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 16204 bytes

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