Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8ee220e01eeb81…

MALICIOUS

PDF

69.0 KB Created: 2021-09-28 16:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dab2a91460f693376681ffc7a8f6cdee SHA-1: f3c3b5ec33e601c01d438a5e76cd5e341777a0b5 SHA-256: 9a8ee220e01eeb813d347cf2f75628faabdd75af38648ce2dc3ec07dd5821e87
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains an image-only interface with a clickable action, designed to redirect users to external URLs. The heuristic 'PDF_IMAGE_LURE' and the presence of numerous external URIs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://wastran.ru/uplcv?utm_term=interstellar+movie+in+english PDF link annotation
    • https://krafteco.ru/uploads/files/84979528453.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/67552108557.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/jenibijasupom.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/guvutalurazisulikamatimov.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/mipejapepotelozajikomopiv.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210910011051.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/25993655360.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219703610782.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/41783657699.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/baboseteju.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/regorimugezit.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/fawepisalexojilopetik.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/nejitavefulimeratoxipo.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/51662115850.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/pamagupofiwutini.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/3718370484.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/vekivitomimisuxutus.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/titevixojuxiwevokuw.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/85399550808.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/potojo.pdfIn PDF document text
    • http://crm333.com/documentos/file/89098065603.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec3eb8aa46---91811458994.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/zekajixal.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/691a0956d3d14fb4607713bedcfc8abe/34339189841.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_off0000b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB241 14456 bytes
SHA-256: 109c6c662eaa70dc1152ba1c8b85ef5581830a4f554de43548968b23ae57594a
font_01_sfnt_off0000d672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 10572 bytes
SHA-256: bd408fe57413fb46635d476ef3a8b5ae933192025203fb90f74662d9390ac6db