Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eda1a239476fd38…

MALICIOUS

PDF

79.8 KB Created: 2021-09-19 17:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7bd08c7532f5e06c4f805dbbebe768ea SHA-1: e9170bfedb476572b1775480e2495cda9c0aa21c SHA-256: 9eda1a239476fd38c19988ae15a9880abb3194ec2a3a52878782295a970da07c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm on disposable hosting. The primary lure appears to be a link suggesting a download for 'warcraft 3 para android apk gratis', indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

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://chcial.ru/uplcv?utm_term=descargar+warcraft+3+para+android+apk+gratis PDF link annotation
    • http://elosc.com/upFile/file///ITX202109061751004002.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090712342673499.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/72988739098.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16132c556bd5fa---fituderutedujil.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/wadevomemotawukiv.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/53876958480.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/nupafufodadokazoxofa.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/zufitesewesinonujukur.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/jusasibusurosixibon.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/nb0i9n58phkvg6t7bnp5dda1ms/polofogo.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/zoxefanuxefimojaj.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/48204982867.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/tupusetesebuva.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/sajesegenizapalaxokis.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/dawaj.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/82467319712.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/14074372283.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc37a294f7---36567313265.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/71236004710.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/kawotudixu.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/35079031666.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/kupatam.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/neseburawobamedar.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_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 11100 bytes
SHA-256: 78977fb8aecf03da9b1d147a32404c41f455d6a35ab1209fd0b5ed059b1561de
font_01_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 20296 bytes
SHA-256: bae4f423358ad0f97fb5f360739aa195cda42f69cfd26898e6aa6576e35677e2

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