Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb14a9412e9135ee…

MALICIOUS

PDF

93.2 KB Created: 2021-09-16 18:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 213b1a93c1aa9f72b6dc162fe2a0c840 SHA-1: 76ca9c27771b469098e72a0d88a53775c4f04c06 SHA-256: eb14a9412e9135eeb1dd75395beb6702b5ce56d636b50a0227f3c2ca5389835f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL and heuristic findings suggest the document is part of a link farm designed to redirect users to potentially malicious sites, masquerading as a legitimate login portal. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 5

  • 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.
  • 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://montazenabytkupraha.cz/files/file/todomadej.pdf In PDF document text
    • https://seger.cz/userfiles/file/4584753074.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/4528347790.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/14819444391.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/numalutame.pdfIn PDF document text
    • http://keramann.ru/uploads/files/87353238292.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/57553299594.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109141911291192.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/sepegelug.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613431897b4d2---21985039231.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/84568568515.pdfIn PDF document text
    • http://pasted-radio.de/web/files/zemamajunimarilisuxelum.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/wewifekagigikazunumog.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/futitojiziv.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/nalezizofagusesopomemerom.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/97498949362.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/daxijukagokozijumigitijad.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/vuxepofopavuj.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/fudodadimuxage.pdfIn PDF document text
    • https://sharenkon.com/files/vojofujar.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/zozuzosazijabimaz.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbcfb0af11---nupumuruki.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/35113656193.pdfIn PDF document text
    • http://��ght.manIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=login+365+0fficePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 10492 bytes
SHA-256: d64647ea7c885640223d0866697a95e977a9fa190e35d4b9dd9cba2f7dc562da
font_01_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 16564 bytes
SHA-256: 0b9c1070a77e502fb0814f8033fc77b6ce77ce3fed2fd81f3ea4f0c6a9fd53ec
font_02_sfnt_off000102a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A1 2128 bytes
SHA-256: 57e0292be3dae69396d24eeb93d5f695b45ab015893fb967353d758df89f1456
font_03_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 26732 bytes
SHA-256: 80c77839eef3622518b0afcd418e7a5eb1157f482813bbd7515273ff6779d7e3
font_04_sfnt_off00014e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1