Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4d2345eee8959b…

MALICIOUS

PDF

89.6 KB Created: 2021-03-21 23:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5d3e3852e46a3cb47a81cadcbff6bdb SHA-1: 9c69fc7826ea51df49b12bfb9dff42f959b1f2a9 SHA-256: ce4d2345eee8959b060bf20648b61bab7820632fcebc051d83bff25a0fceeac3
156 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 0.9998

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
  • 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.
  • 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://pelibifir.ru/123?utm_term=carrier+ac+remote+manual+rg56n PDF link annotation
    • https://cdn.sqhk.co/mepejuwaj/aWzlw1M/sosoreseriwaxonojuwu.pdfIn PDF document text
    • https://jesidovelagira.weebly.com/uploads/1/3/4/7/134705211/bibapizos.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/hfu95I6/smart_classes_in_high_school_for_psychology.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/jbwP3ig/tinudakovul.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/dbibfkn/9132354013.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/dijihdJ/zeronuzin.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/uiimnji/kivasumija.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/Hidigja/kimirux.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/eq8VRpD/3785284966.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/iaIhiTd/gufiduzazodipibeza.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/igcichf/14433784330.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/ggijvqv/pc_games_2020_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/rawavuzom/gijc5ii/25023263391.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/FRdPgjw/naija_life_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/rogazume/ycbgdzC/have_has_to_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/sozivowemin/fP5PV4z/exercises_to_kick_soccer_ball_harder.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/qHKefib/babavorefofowopat.pdfIn PDF document text
    • https://wukugisusip.weebly.com/uploads/1/3/2/6/132695501/3e7007da1202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_d7fb67012a4442e3989cba5580340b00.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_a6ce7ff86abe4c5383cdf7145a0fec48.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_off00011849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 5124 bytes
SHA-256: ead14950f53f83db3557484a230d2e4220b1fddacc288e1a2d063978088bb30d
font_01_sfnt_off0001299f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 18904 bytes
SHA-256: f33b0982eea78a45db4b237b10112d883d9cef6c5a207d9b583c1e9f9713fe39

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