Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f6ee3feb87065a…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 06:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5d590c99a3cbdb45e77ded00751f1f5b SHA-1: 7d86bfa513b323140220ecfc94e205610bb03747 SHA-256: 83f6ee3feb87065aef22af1842a8aced6b0acd2365d25dcfcc977c15c1a6d980
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to 'nipisod.ru', likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=pitch+black+wallpaper+4k PDF link annotation
    • http://fabermanufacture.ru/realidades_2_capitulo_2b_page_47mxw03.pdfIn PDF document text
    • http://freefire-gifts.com/61739604897l5dld.pdfIn PDF document text
    • http://demask.space/football_drills_for_8_year_oldsjfxgr.pdfIn PDF document text
    • http://ontrade.top/baxebatigovolebofadefegufa7wps.pdfIn PDF document text
    • http://nextauto02.ru/32965777990i3ldq.pdfIn PDF document text
    • http://hookup682.site/capacity_market_auction_guidelinesn52dp.pdfIn PDF document text
    • http://fartook.online/hmmsim_2_train_simulator_download_revdlsy48g.pdfIn PDF document text
    • http://allerlo.xyz/is_h2co3_a_strong_weak_or_nonelectrolytehcbfz.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/fosokaputakazutadokekovevqgagt.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/why_spring_boot_is_betterpussi.pdfIn PDF document text
    • http://govnosiakxws.online/5610440950rspwl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/perrines_literature_structure_sound__sense_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/9362881370.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/18030192603.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/69185940684.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/fasekisejumoxesej.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/6413874600.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/capacity_assessment_form_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/parefew.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/84543512141.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 5228 bytes
SHA-256: 54c6a83f6aabd5693a6b648987eee088cfafff7fccf331e584b1bdf6acdfa551
font_01_sfnt_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 10664 bytes
SHA-256: 7f552b791c52d9e9735553a11f428bbad9e78c5bb55ac4e80eb09b6a7f5b2369
font_02_sfnt_off000110d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D9 16276 bytes
SHA-256: f88488b1bcda94e7b425f8fe46bbbbe19722a3a0d347b8b5b7d38694d501adec

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