Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec17fd536249372…

MALICIOUS

PDF

80.9 KB Created: 2021-04-02 23:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e966a23aab298183979b50a5b3215cb5 SHA-1: 516aa6845d8b05f053a28da89cb1b466b7d97c0a SHA-256: 3ec17fd536249372bd961223d6dbd9c104461a2a7f73a37b55fb05be9e645184
166 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains heuristics indicating it's a link farm on disposable hosting and attempts a remote support tool lure. The embedded URL https://resalured.ru/123?utm_term=blackberry+passport+android+app+store is a primary indicator of malicious intent, likely serving as a download or redirection point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://resalured.ru/123?utm_term=blackberry+passport+android+app+store PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484812/normal_6037ddf7999d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410190/normal_5fe460c1a6c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_600cf0e1cc608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_603375b1d92cb.pdfIn PDF document text
    • http://favowavuwoxi.iblogger.org/xisusoxaxodabudas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469638/normal_60091fa094561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd662220ae91.pdfIn PDF document text
    • http://vupaniseb.iblogger.org/what_kind_of_oil_does_a_honda_gcv160_power_washer_take.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5fe5a55288762.pdfIn PDF document text
    • http://dexowowijovovu.iblogger.org/web_browser_video_er_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378381/normal_6004a6cf8e674.pdfIn PDF document text
    • http://tozufokoxogo.22web.org/86711419090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b3f281-b590-4bc7-a1db-6efae81bb30f/how_to_use_the_graco_magnum_project_painter_plus.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_aef915e1e6884ee48dc547d9eb1d9cb6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4f660c-3883-498d-af1f-ef1c3402e2f5/13746910555.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/88385064928.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_07a347eadf00444a9c473dcdc0c54247.pdf?index=trueIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_ab44a7a30aae4a9790b99a61d8b845a6.pdf?index=trueIn PDF document text
    • http://rivebop.epizy.com/eshop_joomla_free.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_9dca011bdba142c2b420a6beb4900a31.pdf?index=trueIn PDF document text
    • http://jabaxuzadowepep.rf.gd/princess_mononoke_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650f94b9-a653-44e8-805a-a509069097ef/is_options_trading_legal_in_india.pdfIn PDF document text
    • http://kulaxukiju.epizy.com/bams_3rd_year_syllabus_download.pdfIn PDF document text
    • http://bapifodog.epizy.com/autocad_to_converter_for_windows_7.pdfIn PDF document text
    • http://kesopepi.rf.gd/pentair_easy_touch_remote_pairing.pdfIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_4eaa353d70444b539bce67930f536f4e.pdf?index=trueIn 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_off0000fe1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1B 5424 bytes
SHA-256: 7b77df73a3a040f77bd799dd6692d0577b563294e3ee7771f67c79dd19301c3e
font_01_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 10944 bytes
SHA-256: c3f4291378cf85b67343bf6433301c9cf10e78229eb35a465377d9255ea45778