Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9df533d8e790be9…

MALICIOUS

PDF

80.4 KB Created: 2021-10-10 09:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 399d9d64faebc93083c1ceb2868bb556 SHA-1: d5e25b39ae13ddb8e05ea5de73d9d6a1daf1a06f SHA-256: e9df533d8e790be991744d8e375b9baffc499744ded510def06ecb275fb70149
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. This suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4647

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crysiq.ru/uplcv?utm_term=how+to+select+words+in+pdf PDF link annotation
    • http://universalgroupautos.com/files/others/30678871050.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/54987654050.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615416c14277f---63246175574.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/trur197fqd29jsja7qt46nat53/mabopuzironev.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/75020695716.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/pumobodizawub.pdfIn PDF document text
    • http://canadanur.com/resimler/files/pozagulesoji.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/nuxajasadodolojikonufe.pdfIn PDF document text
    • https://afma.pt/site/upload/file/nakexiwusidajukejewur.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/80039806711.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/29535795570.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/89016499381.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/14491685935.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/vavedisokojenapixagitop.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/12587222004.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/naminaminogiw.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/16080639327.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/xozurorafidovuxo.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/daxumunabusupetivixu.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/32668023384.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/3775555768.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/70751737800.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 10528 bytes
SHA-256: e6967d400dcf101dab0e23b21fbf2167e20662980c9986d04ab2ef1d3b9af274
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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