Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3e9a7b28c6c8f4…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 10:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a60b771cc5c2a5918613991e217cedea SHA-1: 979f93779239f0266332ef57f7ec9e62eafe72e3 SHA-256: fc3e9a7b28c6c8f4856083389a18a8502257f30fdf04a03451288d7f844b2c9f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with a critical ClamAV detection of 'Pdf.Phishing.Trojan'. It contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to potentially malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=best+file+converter+app+for+android PDF link annotation
    • http://tsrmvolontari.it/userfiles/files/42192685282.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/kujaxivibikidatumapub.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/12285289987.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/zigezewaromafarisivitot.pdfIn PDF document text
    • http://industrialdevices.in/uploads/49813244140.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/95737356429.pdfIn PDF document text
    • http://liyangah.com/Upload/file/sinodazuxoj.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/buxoravofeko.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/25009583502.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/fenudizageti.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613c089083b14---pubefemipugomodip.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/sejarunupopuxikulapi.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/20722440691.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/89259956274.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/33179803281.pdfIn PDF document text
    • http://haitrungkim.vn/uploads/userfiles/file/koduzelosiwimuzo.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/33793730126.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/kulalanikelibuwe.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/jamosawoxedusiw.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/90724288150.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/powajugavike.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/10166318804.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/jazewis.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_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 17276 bytes
SHA-256: 5cccd52b6c93c94cbd9c358ee58916ec1455dadaf5eb44764756c965f46158d4
font_01_sfnt_off00011632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11632 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E49 10732 bytes
SHA-256: 70cdc9a2b0bc76dca971676c18c17890d5b9735930faa9880193823326cd2a41

Open this report in the interactive analyzer, or submit your own file for analysis.