Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d89fdd114942fb…

MALICIOUS

PDF

86.4 KB Created: 2021-09-21 01:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a4de1711213c2a578a7b63e136e9fe39 SHA-1: 9e10f839ef718af319240894637ed407d5b8640d SHA-256: 58d89fdd114942fb7a60cbc0d7dc78eadf6a07c70e8f179a7403b478d4a6ed19
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs, indicating it is designed to redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document itself may provide instructions or a password to access a further payload, a common tactic in phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://coretry.ru/uplcv?utm_term=free+snakes+and+ladders+printable PDF link annotation
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/botaxubabezofalojusax.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/jonebovojarorug.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/vumixizevuwifedepuxenaj.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210902100819.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/pagujabesimonariravifir.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/54768663952.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/70412652861.pdfIn PDF document text
    • https://ibextrail.com/editor-images/94260229918.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/kazepolujodofosarixe.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/kelowigaso.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/dibesewemosusi.pdfIn PDF document text
    • http://rs-entp.com/upload/file/wubiwolubukerepujoreju.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/92537850638.pdfIn PDF document text
    • https://pmms-online.com/assets/file/75745060916.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109031446292928.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/kidulodetawuranedetives.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/4417ad9ea25556189e1a5650285360a9/96489576710.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/depekirigusabawamutov.pdfIn PDF document text
    • http://faradbox.pl/files/file/56935439858.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/rikapi.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/rerizelejadavem.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/4485925144.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379869c73b2---40642718137.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/regomawuzawujususaderavu.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_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 10472 bytes
SHA-256: b4ea97f9840e8beef9d00b61866ca8e8bdc07bc1a7b4109b5a8e8fb8530c7208
font_02_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 18396 bytes
SHA-256: 9a778253cdef2290de588283d5e8b52b9b65ed753050e935ff9897b62c947398