Malicious PDF — malware analysis report

Static analysis result for SHA-256 229a65f6a69e0071…

MALICIOUS

PDF

69.2 KB Created: 2021-09-29 13:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f5a6eb20c38dc09f3bf3ebec897366b9 SHA-1: e496992c4e3884fce3e7f7a894c6b6a79f101cca SHA-256: 229a65f6a69e007162d54398b0ec7f51cb737e922a3637507a702a8ff45206b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, despite some being marked benign, contribute to the overall pattern of distributing links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613926364c4be---dudojej.pdf In PDF document text
    • http://studiosiriosrl.it/userfiles/files/zixokuve.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/29967018452.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/dopejabexat.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/afb7cdb327452e6d7e0d300097f3b3b1/88883743449.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/27654907620.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/96769236004.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/nonululifolovugeva.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/98858075069.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/97919606464.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/menutikeloribunopilukowu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xenabamos.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16147dce0284e5---25828281770.pdfIn PDF document text
    • http://demkapi.com/resimler/files/44795290139.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/18511328234.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f46d19262---27160939184.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/26013158090.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/wimituvufixopopidebopapo.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/xaroseruf.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/97902092638.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/nemolinituxivibekixafexa.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/57127835560.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/52551000532.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/41365170789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=online+streaming+soccer+sitesPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E6 10596 bytes
SHA-256: 5707e86294a819fed54333d432115a47f9b08d106a1df5c6d3791d4a337b938d
font_02_sfnt_off0000e01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01F 15512 bytes
SHA-256: 0c022af43b5f168294c8fcae46c7b29a11dddbc61aac762dabae29f0db4801cd