Malicious PDF — malware analysis report

Static analysis result for SHA-256 393ccbc10c0fac3d…

MALICIOUS

PDF

83.1 KB Created: 2021-05-12 16:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0beca99b56638a80bb54633f8aca6eb0 SHA-1: ab3f9f79704b13c0770c26634955bd0d310cf12f SHA-256: 393ccbc10c0fac3ddc426aa525e0f67cfe30765e7b62981a8a84c95aae1a84d2
164 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous links to potentially compromised websites. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a 'Pdf.Phishing.Trojan'. The embedded links likely serve to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://accomplishtheimpossible.com/userfiles_ati/file/fosexoxusawot.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/21bf77acd9f4e477637f96e127097533/37548589834.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ae5c9c1093368b6d3e56c64d2a0e04ae/87286948316.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/d2uordivtic4h3lo08mu3i0d77/64683573194.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/cec658c31e74e29d51a3d6e29e22c3f8/73052421005.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/978943a4d485ec7a33b5e67952c0962c/sukazebewojod.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/fe4ab5f2e5decb88d91a2a2219709cef/sefatemeref.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d64219f527---zuzifovewezid.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/vunadujatonimaselujetew.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/49d98adc85dd74309cea7672d06dbd2a/99909923813.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/julejowikogagamesaj.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097bb7eea861---47032217671.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/ccc1fadde95f28ebd356a677e66d6ed9/bawobe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27dd5422e---37806168240.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e9b029f59---bowoketoko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=auto+manual+voucher+numbering+in+tally
    • 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://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc0.bin
1956a633b6e2bdc78ea9cef0cb6cd19fe4cff2f8c310f4a08d7670aa8e1035f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 5208 bytes
font_01_sfnt_off0000fe50.bin
21ed2441d3f2cbaadd1ffd6adadaadfbfff387d928bd2abd6a8fb4df8faa8b9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 10948 bytes
font_02_sfnt_off000123ab.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 4324 bytes
font_03_sfnt_off000131aa.bin
89144043de731e84c1bbfbe4ca369dfc2d30639cd120853df174068d62963548
pdf-font-stream PDF embedded font (sfnt) at offset 0x131AA 2660 bytes