Malicious PDF — malware analysis report

Static analysis result for SHA-256 034f614ae7950316…

MALICIOUS

PDF

70.6 KB Created: 2021-09-12 23:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 14fd1aa4bed518a1be2fe1743789048c SHA-1: 00c8f00b3242c835b211f7abd7e1d028b96f6089 SHA-256: 034f614ae79503162ce981f91a44ead0a77f1899f778174f36c134c899e20a5e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/30776674921.pdf In PDF document text
    • http://tokstar.com/_UploadFile/Images/file/61206239013.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/82954583420.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/bibiru.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/fezekajowazexovu.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-01/210901084412503640wvgzzcui98ft.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/bamerasotojomef.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210908015709.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/rorurunebaxiwetobab.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/fiwiguxosaxemewavedibo.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/xoxetoneze.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/28200323519.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/32543903687.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/wixivujawatuvexonemumodu.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/95225829257.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/juwixudabutetezodeweb.pdfIn PDF document text
    • https://domilot.com/uploader/files/mozimaxuwaz.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/rudijejejunasenuzezojifeb.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/52337097021.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/tagemurafofelomi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161318e7cc1a0a---lutatipufitiruxe.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336dd101eea---95224474381.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/gedepotaboxexaxokug.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/98325263518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=file+zipper+for+androidPDF 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_off0000b5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FF 10264 bytes
SHA-256: c001e05e47a862a985fe9c7ac18fadc84b8c96d20cff12a6a601b4a8cc8e01f2
font_01_sfnt_off0000cd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 15716 bytes
SHA-256: 8baef0244f208f2d654526f95ffefbed08050872768efbaf6c8b43e0eceb04f3

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