Malicious PDF — malware analysis report

Static analysis result for SHA-256 966e05bbf943b33d…

MALICIOUS

PDF

79.2 KB Created: 2021-09-09 08:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 616fc6a19656c16065b3cd13a3ec2465 SHA-1: ee26774ce9fb01b16c60e745b1ad82e1143dfd7e SHA-256: 966e05bbf943b33dc9ccf487d7d92286eb3827a2590ae93c10b537e925aaf068
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and a link farm structure suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and associated URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=what+to+say+in+email+when+sending+cv PDF link annotation
    • http://pixel-pro.ru/upload/file/2149988199.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/xokuvoxobogajogikakofu.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/39161720241.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/75497498291.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/18687802446.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/66052348829.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/33223759696.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/kojemapitosobirijefuvo.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/zijugibukuxapizom.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/mafopezuseb.pdfIn PDF document text
    • https://ocw.tw/uploads/files/pudugepawanofikebesagipo.pdfIn PDF document text
    • https://ibextrail.com/editor-images/71122661457.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/pobovitovatiz.pdfIn PDF document text
    • https://mattress-leader.com/media/47137725180.pdfIn PDF document text
    • http://4bx.pl/public/file/xukofawamew.pdfIn PDF document text
    • http://goref.ru/files/file/19378303882.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/39975043554.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/leredojegivegavorexifuzov.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/tediromadutinowifu.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/p59n2c5anbbed2adjui8fbh627/86659427120.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/lopefefixeker.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/40687586334.pdfIn PDF document text
    • https://blugarden.eu/file/sofomububeluweriliwuju.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/80963015387.pdfIn PDF document text
    • http://exim5.hu/_user/file/97297289720.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/norisot.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/bitomuwetanatotop.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/memulomepopugemalesis.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_off0000d0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E5 17464 bytes
SHA-256: e7349600d7bcacdcd35989c3662b76debeebd8c90d4d27b76679f484fcfaa9dc
font_01_sfnt_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 10976 bytes
SHA-256: 9ca820a0a2c09a37cf6a7150b900a1d2529b83d7e07eb335055d31e4c2d38b9c
font_02_sfnt_off00011711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11711 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1