Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d24729694bb0e6…

MALICIOUS

PDF

75.2 KB Created: 2021-09-13 15:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 40400355f10bf5161db40faa32e4a7a2 SHA-1: d67285844e5a4f2b148021de598d618668fb1d06 SHA-256: e0d24729694bb0e6f3a622c5edff162c8a05b27a78cc8f98fb55fb5346eb770c
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The PDF itself is likely a lure, with the primary malicious activity occurring upon user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://cordovajewelry.com/images/file/15660676033.pdf In PDF document text
    • http://crystal-lamp.ru/uploads/files/lukikitadujipedewakub.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/gedoxufaga.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/puniworotina.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/segirufulitaxizudotun.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/21670431893.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/nofaxogajilerakujune.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16130c129d53d6---kitatavuju.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/98419446381.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/13370333353.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/womifuxogigunufudomirekil.pdfIn PDF document text
    • http://chinalabware.es/d/files/70228325623.pdfIn PDF document text
    • http://guchen.ru/d/files/zesonil.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/14479099031.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/bexebew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d4f275126---lasifanatafabowobowogi.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/70201751699.pdfIn PDF document text
    • http://altinay-law.com/images/file/lexonanalixupovose.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/85234677489.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/tomagewepinafexuwovumamax.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/20547222648.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/43119025414.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/wapozitebumokodiwekelozif.pdfIn PDF document text
    • http://techmechengineers.com/uploads/5687920719.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/kemupavomarugelezirip.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/xikinetetomijizunasini.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/kifokuvuven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=dolphin+live+wallpaperPDF 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_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 10236 bytes
SHA-256: 37b038247b7151d5f08edc21621dcdcb5e51a5f8740af0521204cf1bf214f760
font_01_sfnt_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 18192 bytes
SHA-256: 5351d74d71232f21cf424d494b45d94cd56231f0787c0abc3a449cc8d06fb0ec