Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c6b3b040436fa9…

MALICIOUS

PDF

62.5 KB Created: 2021-05-22 00:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f2dd49d811a5ea754d23e873c58e547 SHA-1: c271dc2751909e74b6b6a960b3e8ba9b78f435ed SHA-256: f2c6b3b040436fa947780148c5bc934c45f7bcc1d16795d0d79f60aded71cbd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

Heuristics 5

  • 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 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 http://pnmanagementsolutions.in/uploads/moxawajufagipiteg.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/82d500a4ac58bce4c25a091568c45471/butafome.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607022b405b40---genutosimu.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609afcc983ec7---24104035767.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/a77m2d3cckcj0no5022706huk9/70511403855.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4a927f905---24379320906.pdf
    • http://beiwendq.com//data/attachment/file/52682911059.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e51b45172e---zijefekurelanuvedeti.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/h00lj6meqd8bm2v7e2ju4bth92/bewugetitigujedazi.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160874a0f52972---48653332624.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/9rbo2ir38lml15i7qc2qdspr84/fiparadinujeradavokosumaz.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4daa9689c---fifuzidogipuwozezedabaren.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7d78292c3---nifogukejinubugazabenen.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cv01e0vcn0g6t4rbchds0d7260/31736593119.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-15/20210515205205324019.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/220023501f804849003b558b5a667d20/miwoze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=are+there+any+free+reverse+lookup+sites
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ff.bin
bc8ec71e57bab2ce32dc6143619063682b4dddad0fcc00ea19badf365bfafbe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 5204 bytes

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