Malicious PDF — malware analysis report

Static analysis result for SHA-256 e704d70b0e03f4a3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-24 08:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 361e45f1793dd06dd083d9675a2ca7b6 SHA-1: 536895d038b596280937930614e0d6e76a661f8b SHA-256: e704d70b0e03f4a3d33798557ca651fda5abc383b6491d9dfd6a74b6d4e3b697
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as suggested by the 'PDF_URI' heuristic, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://fecoil.com/userfiles/file/kazoxixupubepewedinofilo.pdf In PDF document text
    • http://auxerretv.com/content/public/file/33791653018.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/dixerapaxatabomalalu.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/24966405517.pdfIn PDF document text
    • http://japhina.com/upload/file/99281645821.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/56695695340.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/40258765150.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210907110105.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/nigenoxoforutu.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/lonubadazi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161411094e3616---14004659444.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16130273b7a144---sogojijelelobepitevejilo.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/mizixonutofedalufib.pdfIn PDF document text
    • http://agilesolutions.in/uploads/vefefipegeji.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/5105916111.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/62891280740.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/21268820131.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/bexezujar.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/ziregukileref.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/lugoxofitobir.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/bodipavaw.pdfIn PDF document text
    • http://iphysiology.ru/upload/43183886642.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/68137436009.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/vigaxadezoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=best+android+app+to+make+lyrical+videoPDF 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_off0000e36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36D 16944 bytes
SHA-256: b16ef46e59d37f6d99310fd25c6f2489d79d015c87d299198366a1bf754c4cae
font_01_sfnt_off00010f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F43 11000 bytes
SHA-256: f0bc7ca4d58b4794c9c2bf9de797a1c980e584c8d6ebb9a83080b3eb6adbf95f
font_02_sfnt_off000128e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1