Malicious PDF — malware analysis report

Static analysis result for SHA-256 332b8076bbe5e15f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 10:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85708188ff80dcffb70f147c0d5f2aea SHA-1: 3dda3307923f9e15628ffb289bb57af92ee9f4aa SHA-256: 332b8076bbe5e15f765193d4a70a77551d4d6bf8e9cb5823d202b541479d300f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting, indicating a link farm designed to obscure malicious destinations. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may instruct the user to decrypt or access a password-protected archive, a common tactic for bypassing gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://ride-on-earth.com/images/blog/file/panekatokedagozujodu.pdf In PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/dijala.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0343d3481---buravuvufek.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/63641642870.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109081451031103.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/dugilitalu.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-2/20210902220533903585.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/rejaweberevafig.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/94031169275.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c308107a23---tifuk.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/23077193937.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/pufinakamomedowujilu.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210909023730.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210906135937.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/bipipedaruluxa.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/32731094862.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/samoxawedosa.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/16860093125.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/11036892182.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/26641648863.pdfIn PDF document text
    • http://health-bridge.in/upload/file/vopigezuzamaludidad.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/mirulazedebixotezinazele.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/89556383383.pdfIn PDF document text
    • http://artio.pl/files/files/72386900282.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/duzedigiwelub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=come+modificare+account+google+su+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 17932 bytes
SHA-256: 04f6e1e4f4b35a2d7a60bb61ac0b76fae6d3a306347b8a082f574b3e24805828
font_01_sfnt_off00010f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F83 10952 bytes
SHA-256: 61f937e9814638c5bc3b1f1ce97f123da3980980bc77803aa3808a31772eaf7a
font_02_sfnt_off000128b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1