Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7de5bbc30fb870c…

MALICIOUS

PDF

81.6 KB Created: 2021-08-16 10:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0de19970373c85e15429809bea815d19 SHA-1: 08c6e5c0e42be8af5a3253de74dcfda7c778617e SHA-256: e7de5bbc30fb870ca6284ee7d25fa2043a6f2d661e46b65e3ba3affc7052fbcf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=bakery+story+mod+apk+unlimited+money+and+gems PDF link annotation
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d70d33f604---29994893706.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mikegefusetolodilike.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16106a482cd703---43814525206.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/766f5a6a17506a7b6603379e1147a299/54394485148.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/wupavanulebuse.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6n63ikmg4np23n0bv0qbakjpsc/79405065150.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/rodabuwefila.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc82ff5d12c---27403196135.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/8idfb8e3otrge3pk7li0n2tbg3/jirinuf.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/29785965420.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/woketad.pdfIn PDF document text
    • http://kyea.org/imageuploads/xodixipo.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/41506959948.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/de7acf0e73dbd160809fb0b17fd7c04a/19717286195.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qoumqlc1tiqj3nlckk80ee9imk/wogimi.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/27302544449.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/safakilezos.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/muxejipazevibi.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/57670047143.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd6bee6324---73239816466.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a099a06f9ef---nemageba.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/247f1be3bcf72c3bbffc11db200ae62f/50459215200.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/vijabadiruziposisel.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/kerelufofolajobudiwarepi.pdfIn PDF document text
    • https://wagaskar.com/media/70722848634.pdfIn 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://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_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A3 16236 bytes
SHA-256: 1f7ea878298d414271c1e3ba9b3aa570bbc7f7b62b5bc4b8d7992069e4775ccc
font_02_sfnt_off00011d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D38 11092 bytes
SHA-256: 1ae16233cd29f29cb765a30fadb7cca7f810c7087f93c8e0a776dad9d850d0eb

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