Malicious PDF — malware analysis report

Static analysis result for SHA-256 27eb242d8903908f…

MALICIOUS

PDF

75.1 KB Created: 2021-09-18 07:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4db482dccaf5cfef0e08880894e6bee4 SHA-1: e6bfa53680210794a9b5c019e2c8c13cdaecb64a SHA-256: 27eb242d8903908f9c1bfc92e20d2f5df4e7dedb0de4c7391d42501ba29fb245
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to suspicious domains, and is flagged as a link farm on disposable hosting. The PDF's structure and embedded links suggest an attempt to redirect users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://h1t-url12shio-turbo.com/contents/files/23611636250.pdf In PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/wewigamanul.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/16562272399.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/79856055396.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/gagugewudoxef.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/97198533342.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/renovepawimogiwolofagudak.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/zilomunixifi.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/96425224296.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/17850788148.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109141020299970.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/83730854765.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/pafuvun.pdfIn PDF document text
    • http://semanbio.com/upload/files/goxaziroza.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d400df62f---fevuzopozeteko.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/50321435783.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/sulovepogurexiwi.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/weramakexi.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/koxapejuje.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/vaxixamubezunixofidi.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/5977350316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+rotate+pdf+file+in+laptopPDF 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_off0000c185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC185 17884 bytes
SHA-256: 29b8d5ee5849aef447cc0754f2bb4994925960a561b8bca19f2556587150e0a0
font_01_sfnt_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 10400 bytes
SHA-256: 31d6cfc5ea5a3bc9781a78ef0c9be283f728abc074f73a4618f60710e8b3b16c
font_02_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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