Malicious PDF — malware analysis report

Static analysis result for SHA-256 862127db271d44e7…

MALICIOUS

PDF

65.7 KB Created: 2021-04-28 04:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bda8c209c59180e4d8451b081af81b SHA-1: 7f1cabcd5362ae2878f510ca44b511e378df640e SHA-256: 862127db271d44e7501d9b64392cf7f27392266bfd32be28d491b198cd46e58f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content or phish users. The document body, though heavily obfuscated, contains references to a song video, likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9111

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
  • 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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088011fb783d.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/94o2ps939ddfis5kepf540csm7/vemagewoguw.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/31cf39007808d9bb8862f04cd4e2eb6e/jufikizuxalawavamojobeda.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16076289c36d5e---50629953757.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608887f9468fc---kenivuxinove.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/a8840cef93f00a6b579a609d6a5befe8/tofepawozubavideligivodo.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/5amqirfdpbr91p2nlu9rc8t0jm/5217821581.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb93ae4a47---19206460287.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/92uiq3donipj7spg0fbb53sed7/kadeboluzexeliluk.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a1628062350fe6fbc4fca32d1486c86a/66154965963.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/srrnf232s40pffrj45088a91d6/rimoninevixixonazezuxupe.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/904f4efeac8bcfbc9e02e7c4b41db3a4/75523495278.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/1ef42fa8bd1865d9a05ba0f2f369c35a/nifagus.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/26077caf5d0679169b9f9c29e52d7204/megurokurobijak.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715bf55eb9b---pezitojodov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=karni+padi+badmashi+song+video
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d484.bin
d1a281f7865682dcb61ef2c7cb3ce33ba4577cc7d0d42434b6974bd1fb074479		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 5512 bytes
font_01_sfnt_off0000e71d.bin
c180083d3fb96e235dd4f551e1a0d089069bfd81e6fdb356411649d246f5ed85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 11184 bytes

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