Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a6b9b0edfad05e…

MALICIOUS

PDF

81.2 KB Created: 2021-09-21 12:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b106b76aaf69b1c15f613ed554635ed5 SHA-1: 67f67569b7b3b16619e30cda1cc13b13bbeab6c3 SHA-256: e2a6b9b0edfad05e2bda5c5c68215e697d0d63cfa9195195c43e05bc554bb4d5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links to disposable domains, many of which are disguised as downloadable PDF files, suggesting a link farm designed to host or redirect to malicious content. The primary lure appears to be related to Play Store download issues, aiming to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=play+store+apps+are+not+downloading PDF link annotation
    • https://aildf.in/userfiles/file/fonuvekonozokuwin.pdfIn PDF document text
    • http://congtyvima.com/images/Download/8367081888.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/13815291832.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/zawitatajexose.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/kusosusalifejorukuka.pdfIn PDF document text
    • http://geodez.com/pliki/file/farolil.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/81497503571.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/xokudufalopagelobadow.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/5557320307.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/wudelupaworoforifokakuzo.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/6808017329.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/64768664305.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/13719240460.pdfIn PDF document text
    • https://henuopack.com/d/files/86187052730.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ffc51a1ea---mikapusogumiwukumik.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/fipumoxurilurobasoz.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/xazuwidom.pdfIn PDF document text
    • http://jump360.co/upload/files/20210912050507.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/50030613515.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210919030003.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/82420934553.pdfIn PDF document text
    • http://marymo.ru/uploads/files/49035560828.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/98123236793.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/49404705390.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/10582885904.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/84128729107.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f077fd62---kiwokupo.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_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 17220 bytes
SHA-256: 209ddf8365262f6e737fd8bbb1239a1054e36102928026cfc5187040cd157bfe
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 10768 bytes
SHA-256: 0714225b10d433cbfd2cc32223748b26cd702aed2c55aedd83f03a6de8d27ef5