Malicious PDF — malware analysis report

Static analysis result for SHA-256 2947cdd2441b19c4…

MALICIOUS

PDF

75.0 KB Created: 2021-09-19 04:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d3f8a2120c40249edda57f707568c69 SHA-1: ae8693933971b7bbe0fcabef481aac80a44fccaf SHA-256: 2947cdd2441b19c4c6cdb539ff2098a781b34dfd423270790c994f7f524b28ce
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ketchas.ru/uplcv?utm_term=good+fats+to+eat PDF link annotation
    • http://i-physiology.ru/upload/mimazetapekolikotad.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613098b7e4344---netokuwazejaxop.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/vezezokurew.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/fojubexusomudas.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-15/20210915174820657653.pdfIn PDF document text
    • http://chenruichem.com/upload/files/pinalanigoxavakoriji.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/pofidodibizemuxozik.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/59844284690.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/lizelif.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/folisigariroxax.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/mukegovekekopudemabizora.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/miwuzoxekixakopazetim.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/nezifakuwivejokifubinosoz.pdfIn PDF document text
    • http://rococosofa.com/files/files/wisaluwezupozoguzonegu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ae209fb14---22036587798.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/sawitaz.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/dotizelizixakazuvomom.pdfIn PDF document text
    • http://oodow.cn/upload/file/2109110107086548211i0h9w2hedrh.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/80989226014.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/xorixoben.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_off0000c547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC547 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 16604 bytes
SHA-256: a206b371860fc38877bcf048a3810c092c434228cc28d5ae3a986dc7e7b05ded
font_02_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10044 bytes
SHA-256: b5b08cdb631b4f31c31af2d1ca8422c21ae45c0bbb5ed9c73c9f69ecae5aade9

Open this report in the interactive analyzer, or submit your own file for analysis.