Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afdb4c3d20b65dd…

MALICIOUS

PDF

74.4 KB Created: 2021-03-29 17:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 393973ff2bcd10fad9485122afee31ae SHA-1: 727f66ed6535f0cd74f2cc71bdd89a0e91847b3c SHA-256: 9afdb4c3d20b65dd1514608b90b82014f3099180dd79d7f39d52ed3d490d37ea
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous external URIs, including a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document may instruct users to install remote support tools, a common tactic for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=solving+absolute+value+inequalities+pdf PDF link annotation
    • http://de-bewertung-889562.icu/rotaviravuxodafexel18fp7.pdfIn PDF document text
    • http://reggis.info/nakezagorolg4a06.pdfIn PDF document text
    • http://terem.space/roms_para_citra_3ds_emulador_androidtb84o.pdfIn PDF document text
    • http://nukels.xyz/fender_mustang_iv_amp_specs7jc9c.pdfIn PDF document text
    • http://pojaris.iblogger.org/movar.pdfIn PDF document text
    • http://logmeinnow.xyz/truck_driving_game_download_apk5xrqr.pdfIn PDF document text
    • http://wunedefewadonif.22web.org/surfboard_sbg6580_wifi_setup.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/puwevax_sevilifo_jugazos_mofanurajeze.pdfIn PDF document text
    • http://mmeueue.space/adobe_illustrator_cs5_logo_templatecof9u.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/1179126.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/buzupovudajesagan.pdfIn PDF document text
    • http://razvivatel.blog/wudevaxozafigalazgfa9o.pdfIn PDF document text
    • http://giveaway2020.info/vukunulv2duv.pdfIn PDF document text
    • http://vadonodip.22web.org/22281098140.pdfIn PDF document text
    • http://voirly.xyz/totufobikojuwukevibigoxouygup.pdfIn PDF document text
    • http://davofaso.22web.org/mudid.pdfIn PDF document text
    • https://bozetefaz.weebly.com/uploads/1/3/4/7/134733050/5646044.pdfIn PDF document text
    • http://eglo.club/zombs_royale_hack_download_pcjubmu.pdfIn PDF document text
    • http://cyberghost.store/6451_east_frontage_road_merriam_ks_66202n9tc0.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/veteve-gofowul-nomuxe-lusobilapolel.pdfIn PDF document text
    • http://vorgazme.com/hayward_h400fdn_universal_h-series_top_pickpgxzr.pdfIn PDF document text
    • http://moneyindia.site/tebusomu1fyvs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01F 5544 bytes
SHA-256: 10df87fde450bdf1cf8b26b1b40083612b8384dc820eeccc3be2ba88942659d1
font_01_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 12036 bytes
SHA-256: 66525b13881b7f4125ffe0ae906fc4f2dfc222ea49609a2ae17cac6127bb4cb5

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