Malicious PDF — malware analysis report

Static analysis result for SHA-256 5201aeb3c79b717d…

MALICIOUS

PDF

93.3 KB Created: 2021-09-03 10:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ceed7d14f1bf89a101d11b033f48280 SHA-1: 7334ad48fb229674572747200d5b2cf9b06ed38e SHA-256: 5201aeb3c79b717de0c2c6237f7a831d06d6559aa39d895e9a0f436747178687
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV. Static analysis revealed numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The PDF structure and embedded links are consistent with a spearphishing attachment, likely leading to a second-stage download or a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier clean score 0.1093

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/be11b20a5574541b1c2542e90a369ddc/59718696936.pdf In PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/vobenugibokewoputemotun.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-3/20210503071751201808.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/28085258693.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/891ce85f19653ba25b1dd341030c0d9f/rojuvomisemimanetowiwele.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/qfaschm1b8rduitg94begfdjn1/12360156269.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ace60475934---wujejatolomafot.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/55819335999.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/27271615874.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430105156594342.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd017c93214---bibijojukusuluf.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/vinawomoderaweboduro.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/xifowuluxetenaf.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///pitutowigigu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/4k5i0krhbqkbaqnd7vhmkjvgtl/83256911996.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/nexajigenimuda.pdfIn PDF document text
    • https://dm288.rs/slicice/file/vafikekadojasok.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb082ee2e---94203720496.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/92650148056.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/melekemupadaxeg.pdfIn PDF document text
    • http://fields-on-earth.com/27069184577.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160747001b21fd---43294822946.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984314e4325---mesanubedurerizasonu.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/notiwapinesax.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/17953069593.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/oll5ihb77mfluci9liiimmsp2r/79550045358.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a754bb11f---firavigasi.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nufawapaxej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=yoga+vasistha+malayalam+pdf+free+downloadPDF 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_off00011999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11999 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B0 11192 bytes
SHA-256: 389aa2ada76e24e43e02f45487dbf73e5f3aeacf885e5927806e87d2bdce8f3b