Malicious PDF — malware analysis report

Static analysis result for SHA-256 06be8ed7ba9232ff…

MALICIOUS

PDF

78.1 KB Created: 2021-09-14 08:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ebd8fd0cbde9980ee63d1a96bad7dab6 SHA-1: d1ec2ec3ae4a84fc635cb42bf8becc959267775c SHA-256: 06be8ed7ba9232ff9e30e0cb32194291a3cff0474d3c09ffa4e0d1a3c66f9cc0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of embedded URLs suggests the document is designed to redirect users to external, potentially malicious sites. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://de.ruben.pl/ckfinder/userfiles/files/levuzapawafixijad.pdf In PDF document text
    • http://hanauhrova.cz/files/vulibafajenezoxoguloninal.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/fotoda.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/warodawelu.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/99266984007.pdfIn PDF document text
    • http://scpt.it/userfiles/files/jewepewi.pdfIn PDF document text
    • https://el-tall.pl/pics/file/bebiroguteranuvikexidelis.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/muxuxu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613c36077650c---vezazeninorabis.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/14746671138.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/fifugejazu.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/61126181091.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/xaxodugawomigu.pdfIn PDF document text
    • http://storemisr.com/uploads/files/76444911225.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/76723090125.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/teguvanuxafigojivos.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/72456255803.pdfIn PDF document text
    • https://egf.tw/test2/images/file/vojirolasidej.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/fukajabe.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/13054625313.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/78710624707.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/72883424357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=android+jobs+in+europePDF link annotation
    • 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_off0000ccd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD4 10432 bytes
SHA-256: 88f7c7e54e74976cc6f051b4f1e3042c0be60f7a7a8211d0693f28db14c4e115
font_01_sfnt_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 18024 bytes
SHA-256: 985607fae044e93767c7b794486814da5dd4bb365c806cd03a6cebc3ae3f7b4e
font_02_sfnt_off000112a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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