Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0a22a20c336730…

MALICIOUS

PDF

74.1 KB Created: 2021-09-11 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d556b5eec7bc487fe2e37a55ed8f8653 SHA-1: a9b54c9bf19c6cde1ce9688e6439578def017a41 SHA-256: fa0a22a20c336730373729c5a6a2103f93b99e5ae691d6d4f2607a043752efd1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or malware distribution attempt. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 6

  • 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.
  • 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://mimpishio2bet.com/contents/files/32970347056.pdf In PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/kipigofa.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/jivekene.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/16304389199.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/dutawusowifazadeterexax.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/79778321560.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/def881d92c7ec85c3542344d1fde6254/zulusopadapinijexuwu.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/65107799734.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/60728214454.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18720229431.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/80858818038.pdfIn PDF document text
    • http://merwepizza.com/upload/file/jogokubamelipuvitap.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/15504956451.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/dazugolas.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/66599997475.pdfIn PDF document text
    • https://majubesar.org/contents/files/66177625283.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/65699833790.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/20900314725.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/kulimutusotinafuluxugom.pdfIn PDF document text
    • https://servicepapik.ro/files/xadizal.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/59278527438.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/41391517219.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/joxudifoz.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9e7a21b3bdf0f7e477592d35f940bed5/pubef.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/tezexirozufipikopibi.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/1726888321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=kavalthurai+ungal+nanban+full+movie+onlinePDF 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_off0000bc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC11 17572 bytes
SHA-256: 42c27e5220d3c972896c65851d509ea4a7a7e64f5926f88475f47b8cd4d504d5
font_01_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 10792 bytes
SHA-256: 1f1687c230ddbe2723255a9a6bcfc93252bd732784d3cd0ff8a7927ce051b82d
font_02_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1