Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e970ee3d1738382…

MALICIOUS

PDF

83.9 KB Created: 2021-09-24 06:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 34950700f6688f51554f397b85facc8f SHA-1: db57e79848b6d3e42110b0e687585a04ac16d5d0 SHA-256: 3e970ee3d1738382c4f6e31296d95cacb8293b809b4fbcf8249a9f3f4fbebfd6
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 hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to one of the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • 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://irlanc.ru/uplcv?utm_term=global+media+box+not+working PDF link annotation
    • https://avflash.nl/upload/files/wafobogafif.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/bedozikanad.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/20554355741.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/torus.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/28944964269.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/powanaburekulawiz.pdfIn PDF document text
    • https://mbbs.hr/files/7059757119.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/dirumudutarokarokil.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/oal0o7fjcdud8ul9jh77rlvvg4/14199872169.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411d7470869---ladizuxe.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/lotofazuvugejiwuzejapusak.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/guxamotudirivixapon.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/dabenosike.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/gedadadifa.pdfIn PDF document text
    • http://tzsunup.com/upload/nevazexiz.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/gobovadewana.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/tadukasewapibijerogepulem.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/judeluwiz.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/jirazipizawu.pdfIn PDF document text
    • https://12shio4.com/contents/files/31934729492.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631507535.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/63015014239.pdfIn PDF document text
    • http://npi-management.fr/ressource/site-image/files/84923783206.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_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 18696 bytes
SHA-256: 6dfb6bcdfc4560dc7605bb9fe80ef657e357b1a30418f975f1a9b395c56a9aad
font_02_sfnt_off000128cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CB 10884 bytes
SHA-256: d21271037f4c839aaa1af65cb4ed2feb362d88cbaedd026fc3b36d2cec3073a9

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