Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36c142292e22b59…

MALICIOUS

PDF

85.3 KB Created: 2021-09-22 12:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bee4c05d3beb84f02164c88abf68b816 SHA-1: 7c23be76e2a9bbe536b392aff02f2abaaa9e2a10 SHA-256: b36c142292e22b5926a4d49619daa3440834f8cd39ab6dd56935a6576e4921e8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which are part of a link farm on disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=harry+potter+saha+maya+gala+pdf+free+download PDF link annotation
    • http://uitetenindex.nl/images/uploads/16538424612.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/deguronivomezaxolofotejad.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/60241468807.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/33566150304.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/27802400015.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/ririnek.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/13459358553.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/xewuturetut.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/nepovus.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/14662552321.pdfIn PDF document text
    • http://sergeybazarov.ru/file/vufunifakegat.pdfIn PDF document text
    • http://intertravel.hu/_user/file/97052108133.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/27959642311.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/14914238269.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/jojegemefojevanegipon.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210904_0C631CB55BF5D4DD.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/52018334748.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/58620006308.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/purepekaxawuworalesedepi.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/64567395364.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/agnp8ijhrknsnca1mt0nnni46t/vejujejewugikepixusamafo.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136bafa48208---zakoreta.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/36841907526.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381993cd724---77649089116.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_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 11044 bytes
SHA-256: 05ccc275b626d4262ee4bb178db48363f3415ac3f9494904b839053522cc4b6d
font_01_sfnt_off0000fa96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 19812 bytes
SHA-256: 9b89066f7a71e45b9d40234c7ebc2752dc599ddec859b105253b04804c3b0d56
font_02_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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