Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e28d49ec4dfea79…

MALICIOUS

PDF

80.7 KB Created: 2021-09-03 02:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 47d7282fc42142b99ab7ae8543b15e7f SHA-1: 84fdabcd2db47b3635a04d8b21d0ac6e258553cd SHA-256: 0e28d49ec4dfea79f4e9911daeccebab8eaab4dcb35038f67b73eb3f5ff39c90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to obscure the final malicious destination. The presence of external URI links and link farm heuristics strongly suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://hillandbrownfamily.com/clients/76964/File/resamerejexisusiki.pdf In PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e677803431c---18879031560.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210828_DD6F68DE1AE81E63.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/fufolixixu.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/30824073362.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/fawidapamuragesofobo.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/9b253a1dbfac7a119d053ceaee8037a3/lofetemapenil.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210702095415.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dddd8f2a1---97782438670.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/povidinidikejefebiwoze.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/37e484e3e77c51476892b8979688ffaa/21982121040.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/38002525486.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4b9cfca47c3e4e39a6baed76b895340b/20544016453.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e60c813181ee351e07091416be386c6c/safoduvagubowomulowuvaxu.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/8pqumd402jfbgm16m46h2231j8/32823294454.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/37011854735.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2270536d7---31223230022.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ru43rllb3bn66qgot0162oq8cl/vowodesi.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/36282354988.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/navowizibaxulomupesa.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/bavitovovajusila.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/33941790296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=strava+manual+sync+garminPDF 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_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 18444 bytes
SHA-256: ffe854b0ca437200353197063f3328846a1ef45ea827971af8dd424637572f90
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4B 10676 bytes
SHA-256: fd2ef583d73df3689b7beb86374a5ff4d1e3096fb4fb8519b78adccde0809e4a

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