Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dbf5609d8db97a…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 13:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 698eb78b0e41f1052d7e7f084dedb9a2 SHA-1: 2724016bdfddc5745e33184f50629270244e0fb9 SHA-256: 76dbf5609d8db97ad73c1f1a17bb32d250af464a293e7ba2e9f6b5a00a891ef8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are disguised as download links for popular software, specifically mentioning 'download pes 2021 game'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple disposable hosting links further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://pixomot.ru/uplcv?utm_term=download+pes+2021+game PDF link annotation
    • http://paradisetnl.com/FileData/ckfinder/files/20210906_3BF0C837B54742DE.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/tesizinubutosawuvuvopodo.pdfIn PDF document text
    • http://lex.tj/img/file/zixip.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/kigefagomepuxanazoxinov.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/wirokalej.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/18727777078.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109120406591821.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/gidag.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/vojesabe.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/peboxotuzopagosasavumajil.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/63542133527.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/tebunukateda.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/11293521602.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/kumovajuripavabovutepe.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/wurejirulurujirejubop.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/tetonimizegusugar.pdfIn PDF document text
    • http://195exim.com/datas/files/95395230219.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/88281738014.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/59441939403.pdfIn PDF document text
    • http://arucax.am/user_images/file/dubakujolumixegawez.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/misozobabugavaxadulevime.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/80713482295.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/fabadogoronuperevu.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/8811670285.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://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_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 10824 bytes
SHA-256: 1ff408b85f4085ade249f6928dddcf1eaed4de50c87265a366c99ee59a640eb8
font_02_sfnt_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 18072 bytes
SHA-256: c43aa99923ae197c34e623590e4d522881e794949d5b24a3542ad41f673409f0

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