Malicious PDF — malware analysis report

Static analysis result for SHA-256 690c3f400ea137a6…

MALICIOUS

PDF

72.3 KB Created: 2021-09-17 12:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f9eea40b7456bfd1fc49a0f0c06f862 SHA-1: 6f0122bb05ec52b4cf82269fb9ca5605fe197d24 SHA-256: 690c3f400ea137a688f193b40d61fc60b9a622cff18c8ceed4cdf4037578f35c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=toolwiz+photo+apk PDF link annotation
    • http://kompassztuki.pl/Image/files/vovesexenalizorusinugew.pdfIn PDF document text
    • https://efnnma.org/files/file/pituzomuwujo.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/22930591107.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/vuzeruw.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/3921968167.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/tigozolirewugodexezewus.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413810cb11c---juguboguvezitonog.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/faledevufudokosake.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/lenupomixigok.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/lobepogoxof.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/duxuwutiwinutudebig.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/waberox.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16134bfbb57caa---nejawedununobedexazola.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/20559893603.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/60302023680.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/vubuvuketarixufigef.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-12/33ca8452dcc8ead3d5832ded218953c4.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/gepumixetodadawi.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/vomugugutagojofa.pdfIn PDF document text
    • https://olterus.info/contents/files/99449274007.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/xoladifowek.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/65821984239.pdfIn PDF document text
    • http://beta-rc.com/upload/files/gekejurexumo.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_off0000b995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB995 10044 bytes
SHA-256: e7ddc275584ddcce485cd86aafa4f2c7a267e4ca7125a2a832026e9e1143f5d8
font_01_sfnt_off0000d028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD028 16928 bytes
SHA-256: 863558c1dc47875a28f877f86486092ad620cbb529031d8a4aff6f92d74a1f6a
font_02_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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