Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cde123c7764be1…

MALICIOUS

PDF

152.9 KB Created: 2021-06-28 10:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ba330723337b5d319775bd53176d292 SHA-1: 01543889374906234d49a41de8c94cf27df9392e SHA-256: 34cde123c7764be128b60275203b702c7ec012b4bdfdcc956cc30e0b3491e419
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress installations and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic findings point to a social engineering lure to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://aydinservis.com/ckfinder/userfiles/files/viwonukubuj.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ecb3c9f6d---nokezizedozomorexib.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/602ae0417199f092ccecdc176c74cf64/38520688571.pdf
    • http://files.ibiza-ferien.de/file/50901612223.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/71f1a4db6e15f891a16757425596bf2c/gojexobatubilas.pdf
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/ganalusatu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094839230c87---pimijanomuvesefuvutofo.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/977cd91df906f05a4b0215c2daa07064/juwafigi.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/46473abda6acfd359c42f9e8c6e0c505/94702361965.pdf
    • http://altinay-law.com/images/file/61695006190.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/a9000p9qptu29lvhr9h0bbsovf/rebakugefofebeda.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45640a907---98084317092.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8ut1qndnqmhn2g43pb684brs9d/wefinupilozuw.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ab6929a2c---2127096739.pdf
    • http://mnogonomerov.ru/uploads/file/13968524997.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4bcb90fe---rozulirawenigobipevas.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a980d3a3f9d---nekewu.pdf
    • http://ellerbeefamilyreunion.com/clients/874543/File/92041617620.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c79e392346---23024531287.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/561u2ff863a5smmfhjfj162pct/konuwozegadules.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e57f562810---61532117393.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/igqvfqc4s9bejdi7p6v80gchir/xutakid.pdf
    • http://aceonlinementors.com/userfiles/file/jezalom.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ba7ad478c32aaec20ebf7630557db99d/bifaferajabivixas.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ji2qlablomsamq6je5bovsqkj0/romorubivitimarivedifodi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=us+severe+weather+alerts
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f796.bin
6f4572b4192ebb74f6b3f56da72f32d914edbb0d6af422da502f959c93a43bca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F796 10048 bytes
font_01_sfnt_off00020e2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x20E2C 16792 bytes
font_02_sfnt_off0002263e.bin
31b9f5053eab572ff3fcbe9c15bb73ecf8cd1a80caa07d6503f7c9a7082ec738
pdf-font-stream PDF embedded font (sfnt) at offset 0x2263E 18016 bytes