Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfdfe054b0f2f25…

MALICIOUS

PDF

69.3 KB Created: 2021-03-21 12:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 05dbe2b0db8bed19925a739ab71fa716 SHA-1: ea387f3a33d1c79048c3d6cc0dceb912b0400bde SHA-256: 9bfdfe054b0f2f25c378d1e0af4fa9c2d635ee82c7414db05f2b42f0ac9e3a6f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9777

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
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://dugedepap.ru/award?keyword=cedric+grolet+fruits+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454679/normal_5fe5e04075b7e.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/gc8jbhe/diy_costumes_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/MSAciaQ/consumer_reports_free_login_and_password.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/eTGWt1v/57107604517.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/psicologia_de_la_posible_evolucion_del_hombrel1ito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_6021011392a16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5ff5832f9bac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_60254451204b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fdd8e1965507.pdfIn PDF document text
    • http://vitrinachel.ru/madixeu9exq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_600e9fc118dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_602f0c17f0e70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450043/normal_5ffb8f83f1595.pdfIn PDF document text
    • http://bluebadgeform.com/dirazonipanflxn.pdfIn PDF document text
    • http://timurberg.ru/lenovo_t420_battery_replacement7hj55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_603261b089ba4.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/Y7wjaij/video_face_changing_software_for_pc.pdfIn PDF document text
    • http://erogan-encolumbia.site/mevekoaw4uk.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/ihWY9nk/justin_bieber_bloodpop_friends_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_60176d0c89c69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448558/normal_5ff7590b6f243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mukutud/5090839200.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/co_financing_agreement_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 5220 bytes
SHA-256: 2006c855044c9688da9dcc7fe1afff83be5ff25f0bb4ee433332bae7d50659e2
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 10856 bytes
SHA-256: 37b51682c18be8399dbf89bb061a692c71a1545184319e033a21936cd464cd2c

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