Malicious PDF — malware analysis report

Static analysis result for SHA-256 430f2af1836a19a6…

MALICIOUS

PDF

308.0 KB Created: 2021-08-22 06:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bd5713b2000a96d87d20c25f8f6e8f9a SHA-1: 46b1eb9b8113b71c3df6178b85e9e543c96bfa52 SHA-256: 430f2af1836a19a65646304b9c51f03a4466dad380eea6f6469599709edf4768
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting potentially malicious PDF files. The presence of these links suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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 http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0f561ad78---lumabopomo.pdf In PDF document text
    • http://bogelaipigeon.com/upload/file/kiwalis.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb0ecfa27---kowivadazasebeziditi.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/pejenip.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/41561847141.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/8537479189.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/99682021116.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/399b8c0e5e4f61d18ea6fa8610d42c6c/zifokokorav.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/dubebopibava.pdfIn PDF document text
    • http://cosyromania.com/media/file/samolijutizorozujerufa.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/jogoko.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/jegavusaduxufujudelogiwen.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/47490426092.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/rafezadikuke.pdfIn PDF document text
    • https://diphong.com/uploads/68998910311.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/96493667949.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d75c02294---fikesufibef.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/40279279676.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/oqg65ftgct71v5m8icie56qr8m/99100536627.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/046fe85a4bad7ae54fe5eee609a6579e/12466711246.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/wemurazepewofi.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/5358743464.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/68nga71l0nju2od3m8tc6sqm72/liwid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mechanical+engineering+drawing+symbols+chart+pdfPDF 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_off00045ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45CE0 11400 bytes
SHA-256: 6b8fd1bf88a66daa5ac8a0f68f0c3b09229a906cc7c7fecaea4f13589e2443f6
font_01_sfnt_off00047734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00048f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F46 18656 bytes
SHA-256: e2193754203e0ec9e12434863021fe04a8213bd56a14f1f1d971a041484a627a