Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70ffa4a131100c…

MALICIOUS

PDF

80.7 KB Created: 2021-04-04 23:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0c4692a991fee2e675cd87c29ef7be8b SHA-1: d37752fe513adbbec164421bf6d21c5385c9f567 SHA-256: 6e70ffa4a131100ca24ef6a7fd2989d7885eed9dc0fb3a3bed94af007792d65f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/award?keyword=programa+para+convertir+pdf+en+ingles+a+espa%25C3%25B1ol PDF link annotation
    • https://wowavimisaken.weebly.com/uploads/1/3/0/8/130814021/912cc30fd0b0d.pdfIn PDF document text
    • https://lojimosaxamigek.weebly.com/uploads/1/3/5/9/135976806/wufevibeximobidawu.pdfIn PDF document text
    • http://sagewusibuz.iblogger.org/zukosotetanezudagato.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/eiehewv/93105835347.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/hggihi6/sudoku_evil_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/DniiAlV/find_hidden_objects_game_online.pdfIn PDF document text
    • http://ueuniti.website/jizif6u4ht.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/fgcYBoP/tusopudavenasetoron.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/hhijgd9/99139257187.pdfIn PDF document text
    • http://o-karte-kopilka.com/how_to_think_about_weird_things_sparknotestlep1.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/ohbyPjd/40281199989.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/ggCI1vV/finowolegijuvelaxibusesa.pdfIn PDF document text
    • http://lnstagramverifycentre.com/gunisofejaxfk.pdfIn PDF document text
    • http://itmax.info/powershot_model_5700m_not_workingwpsir.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/8b8d4f426505.pdfIn PDF document text
    • http://sanogisiwelel.iblogger.org/tupodo.pdfIn PDF document text
    • https://rirupalolidofe.weebly.com/uploads/1/3/4/6/134601765/cf8abec2d.pdfIn PDF document text
    • http://saudiautoinsurance.com/dodge_caliber_2007_oil_change_lightvmprg.pdfIn PDF document text
    • https://tafibukazun.weebly.com/uploads/1/3/5/4/135400045/724f2.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/jjgjidK/64483196858.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/1DWUUwk/new_space_wolves_start_collecting.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/CPjgW3z/gavowuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_bb2fed01546f4a89a5eb1df7825f43d5.pdf?index=trueIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_500b8fca28aa44da954366dc32b300db.pdf?index=trueIn PDF document text
    • http://fekidet.rf.gd/onkyo_tx-nr609_speaker_setup.pdfIn PDF document text
    • http://xisajegaxije.epizy.com/absalom_and_achitophel_summary_download.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_99db82ef6b404625995849ea70c2c980.pdf?index=trueIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_723fc49475344e65b7ef160597f9a4b8.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_35bd0c7a1b254a00b37910b6430383e6.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_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 5748 bytes
SHA-256: 49ba280be77f3c99148ba5bd4d2796dd73cdc5440e50a4b982a1dc3c578b621f
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 11468 bytes
SHA-256: 9ed0500858d0b8873c6862901584690450a62af9e304d863121a0107e85434db