Malicious PDF — malware analysis report

Static analysis result for SHA-256 d067f2925463258a…

MALICIOUS

PDF

75.2 KB Created: 2021-06-24 00:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7759d9e3e462d7cecc40899e5f5fe7a SHA-1: d4f6e33375ffa7887c07bb92f79d5cacdc34a1ff SHA-256: d067f2925463258aa13c14beb0f962834f5578a6df43e6117a19f514bf563a74
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Tahoe travel trailer owners manual'. Numerous embedded URLs point to compromised CMS uploads and disposable hosting, characteristic of phishing or malware distribution schemes. The primary attack pattern involves directing users to external malicious sites via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://musorcentrum.hu/files/article/file/70712912291.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0df74e10---23337122634.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/a8tqdjomp4vkh3rjp4k29oeikm/32462843169.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071686a65869---14189606672.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9d899291d060d18e8c7d7d03415d0fa5/64545280717.pdf
    • http://czdashan.cn/uploadfile/file/2021061307213573499.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/kgpav6g55pncf41c0cc94aacs2/rafejuwiwusenevutufape.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4icgek8pic8i5u6q3bt4nc7prn/dipuwepa.pdf
    • https://signika.pl/Upload/file/6933078773.pdf
    • http://www.sport-konyv.hu/userfiles/file/91974268121.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606f678469071---runinozowuz.pdf
    • https://recapress.com/ckfinder/userfiles/files/mekevixexomefezurapelitex.pdf
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/4582174955.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099e1c034822---52368399726.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sj0ldtfu38hr3ol1qt32hinio7/fofasokunawifaderi.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858bd60955b---wodofanotatasipumurexika.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/4mclhujoo48gvr7s8l01n8bbl4/63865777918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=tahoe+travel+trailer+owners+manual
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c0.bin
0afa48ede0a26588035e2d673d43a11f91846fa23d638ac559380c860cac3e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5028 bytes
font_01_sfnt_off0000fabe.bin
c26a174db6b452a479cbc373a17eb1832a38e45a51d9e88ac6b9e3bb2a225763		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 10872 bytes

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