Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cd32366d05886f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 15:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2f4d978a36ab6713491a9c6f0ef47cff SHA-1: 7440c90eb9f74c7010fc6fff9fc2626df281f138 SHA-256: 07cd32366d05886f2200bb886fbc78993cbf77b4cc4a79507a250814fc5ec284
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=mht+cet+2020+syllabus+pcm+pdf PDF link annotation
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/f0d57a5e14e8cd0e7f037c9f1196de6f/77645389942.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/wuminivimijexuxitirefero.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/22825303348.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/diwisamarirofipanorelomu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/35922669926.pdfIn PDF document text
    • https://areicon.com/images/file/xavowazimozozudodagoxen.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/16148741165.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/f1v7oe33a7ofcmfaev8qe6hiud/44005947243.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/bekudowelipopukumuko.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/rexopomewegukelarerude.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/ropuwit.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/ieqdon2lks6v5qhptjv5va58kk/fulofo.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/98a8a18beb890818d681c03a8ace4571/ratusikovifom.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/96089185723.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/gigepur.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9228d5b6e---37286085507.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ah4079icfedheejkbn4d2kqq5l/soxixafij.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e94dbbd9047d378b82f0ae9737ee7719/sarusexopimarozisosakam.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/wujuralonenelu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983bed8f4b1---dimasoladopukefupafig.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/10895582765.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2266b39951---66208878931.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/e95g8ef5s6ququrgvho62jru9k/46123680731.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/7s862j6v97ee7rk2psff8fb4is/36476331083.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d8167848cd4c1fbc0ce1c9df316102fb/dejijajosepusiwuxikadak.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_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 18196 bytes
SHA-256: 66b6afcfda07b55da0e2232bdc3c3aaadc0daa8a429889392621a1052612d1be
font_01_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 11056 bytes
SHA-256: 145990e408bbcef40aa7db0edda014a454efd9664a8ac83304393984f075d88b