Malicious PDF — malware analysis report

Static analysis result for SHA-256 924164fd122a974b…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 01:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: efb03c274952df612028440c26818d35 SHA-1: 43981c6ae1b636cbf8b4246b20cfea783c89c158 SHA-256: 924164fd122a974b398cbfac2981f4075a146e4f7b8ba63d6aa5013c9441953a
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with several pointing to domains associated with link farms and disposable hosting, indicating a phishing or malicious redirection attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/award?keyword=automate+the+boring+stuff+with+python+programming+free+pdf PDF link annotation
    • http://fasekafalig.scienceontheweb.net/data_science_degree_purdue.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/15072250203.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/31240598653.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/garmin_nuvi_2639lmt.pdfIn PDF document text
    • http://sasegotib.medianewsonline.com/adawat_novel_download.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/48920046124.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/blessed_be_god_satb.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/jakavaxunolevadijatobores.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/94b907c2-63b3-44d1-aa07-3db7e89852aa/las_flores_del_mal_charles_baudelaire_analisis.pdfIn PDF document text
    • https://73ea35ec-f0b0-4773-8bcb-d62b778c7de8.filesusr.com/ugd/a8e976_4fb27276f61b4354b3cc3fae9ada3228.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/jebopowibizafulit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486d41de-6386-46ae-bb3a-4278314b2d5c/xbox_360_controller_is_not_working_on_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/how_to_get_out_of_metabolic_acidosis.pdfIn PDF document text
    • http://widifusi.myartsonline.com/sistem_pencernaan_manusia_kelas_8.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_95c85f5bb77a497b8d662dc721be7f1e.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_42351e5f40bf4a1c88ef5a94d84241a1.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/catalogue_oriflame_septembre_2020_maroc.pdfIn 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_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5748 bytes
SHA-256: c92445abfe804b5ab8daefce848a49d401376d251dbc733cc84fad00d131c828
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 11512 bytes
SHA-256: b2e14127e206b98f94c8e2f72bc72515afd6d48865fec8edfe8068c5cdded30d

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