Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ec97c02c966a31…

MALICIOUS

PDF

71.9 KB Created: 2021-09-12 20:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1deaff72c2e8387e0c8a798dc2d6f41 SHA-1: 7b4bcdbd52e110bee8fcd2c61e6fae33aa349ca9 SHA-256: e8ec97c02c966a3167ebb494d9b63aba7e96974416fe342bac200d70d458f249
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external websites, some hosted on compromised CMS platforms, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or callback phishing. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/4576229762.pdf In PDF document text
    • http://proficlim.ru/public/userfiles/file/jopadogab.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135d98215cff---41759556335.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/pavisejali.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/juvadilawero.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/mupuxewexap.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/bc98adb47608846883b9bde4ed18f913/58532244579.pdfIn PDF document text
    • http://precisao.org/files/files/lodobajiru.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/47476977971.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/83299425621.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/60833592980.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/99311975037.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/xajaze.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138bb114b14d---datumopesiw.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c98c5c1565---xotupezutelijoworewe.pdfIn PDF document text
    • https://alev.az/userfiles/file/moxanukekigivipeze.pdfIn PDF document text
    • https://svltv.in/userfiles/files/82367488096.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/wurarab.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/31848695702.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/68146063102.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/jeripesa.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/bifojosox.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/29401656.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/gakutokegajigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=polycom+android+app+downloadPDF link annotation
    • 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_off0000b7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D5 10476 bytes
SHA-256: 17889cf072513ff1cbc0b82877baccf6a8b8b1c3c2537d4a03339a2bb17901c3
font_01_sfnt_off0000cf99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF99 16688 bytes
SHA-256: 4bb41b86589ae4ac2e9456e4f32aa05e7bcc9427711c07406aa740fcd76831fd
font_02_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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