Malicious PDF — malware analysis report

Static analysis result for SHA-256 003fe7a7c74789a6…

MALICIOUS

PDF

78.0 KB Created: 2021-09-23 15:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e88f918cda4505910a0c4c65677c817 SHA-1: 47084c1f29de13dabb08bebf14126020f77773ef SHA-256: 003fe7a7c74789a607052e6113238e22704136de631eb64cb18d6894ad91b910
124 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a network of PDF files hosted on various domains, likely for malicious SEO or to serve as a distribution point for further threats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6437

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 http://aktifbant.com/resimler/files/zutuparikasewetelulisodu.pdf In PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109121715118728.pdfIn PDF document text
    • http://grabnerestriche.at/95492837393.pdfIn PDF document text
    • http://ty-int.com/files/files/85511390947.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/88449538138.pdfIn PDF document text
    • https://btegypt.com/file/titoganuse.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/nasolotegobiwovapik.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/fonesimirepogepi.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/68687889959.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/29846045660.pdfIn PDF document text
    • http://gekon.net/userfiles/file/digadadusegiwe.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/89155177976.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/30473682532.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/takexesigenixirinozom.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/86893e61e5cb72cbd32cd5c141c8f689/68678559824.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/bakadixugaxumub.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/vigebaguguguzu.pdfIn PDF document text
    • https://bnovum.hu/downloads/35218656164.pdfIn PDF document text
    • http://zerosquareonline.com/file/rifedebemexepazejejola.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/6122108208.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/tumowarixazexosubemet.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/32295357612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=android+vs+iphone+market+share+ukPDF link annotation
    • 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_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 18676 bytes
SHA-256: f6c55dbf1551bb15149fd0ec1d5286cec02c54b78f3af4dab101ef7201cfd58c
font_01_sfnt_off00011f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9A 10852 bytes
SHA-256: 9f1a4948aaaef407a835368297d03bd8e4d9f05377d4a6892b10d7c676a74fff

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