Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32d40afc7d20e49…

MALICIOUS

PDF

301.5 KB Created: 2021-06-25 00:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 492c245255d79e7fb477031a5f1e4648 SHA-1: 5e63fa9aea23644bbb0855b4c998a732fc6e7743 SHA-256: f32d40afc7d20e4930178b43e170da9f830aa3d72ae293bc43c0684a448dd825
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to compromised WordPress sites, suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, but no direct user-facing text was extracted to confirm a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • 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 https://catamma.ru/uplcv?utm_term=max+weber+pdf PDF link annotation
    • https://cgeminfos.ma/upload/file/79885742565.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082798b1f20e---67783884287.pdfIn PDF document text
    • https://advik.net/userfiles/file/fasuginer.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/3ff788344e1e15539ec0749b88844ae3/mibagalexumojeviserojafem.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aabec8befad---78747495278.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210510062829_1189331897.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7d1ace3262e9826245283a084ca9950d/detosalewajefugif.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7476de7666---rimak.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bff77e3f8---77439802998.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/838421895d634dcc98f33064bdc426b3/ribuneluwofidivomelivot.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/75681941412.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f7607fc84---jopimepikadoxeviri.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c1e1699d9f00d5a3d523fa17a8bfb9f9/39970638578.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/82858426380.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608975b6c6dcf---32668918906.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72067b879e---22168830108.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000104c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x104C5 294188 bytes
SHA-256: 43307ad1755f89b6c1f6cd3bae809532a2d0ee53ff3b2a1f378dc73cab8560ba
font_01_sfnt_off00045da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45DA4 5132 bytes
SHA-256: 41938efba2ce52343b178accb2f476ba016d2d3fe3376ac10d5b62fad4af9b45
font_02_sfnt_off00046f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46F42 9352 bytes
SHA-256: c0d9bb644aec00ad4549de169ed6e01c5cda20047587ec5eade528b8a7766cc4
font_03_sfnt_off00048f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F49 16936 bytes
SHA-256: 725cff0185e3c6a58cdac94e9a0cb53f881524535408b952a9e7903ba48b3119