Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a62eb0fa265c6c9…

MALICIOUS

PDF

120.4 KB Created: 2021-07-04 07:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61f482d747bfb1cf6cd9dd6ffd27cb6d SHA-1: aa71f6aa3f2550ba3a09338f0b7cc1b26fd4d1b6 SHA-256: 7a62eb0fa265c6c9dde0566d5967fef7173fc6bf5b1ad316279b80d4f95c8aaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress upload directories and other potentially malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern suggests it is used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd83b4c45---rodokirire.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2g0ndncfleho0sm4j9vvh8i4bd/nipakarapaduxinokujivopu.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2f72ed8d---2216668505.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdc989942---wilelibipudirekiporewe.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/vapudebuxobatorupizitiwu.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/m33ukq94qi5f5gn7eh15isn3bp/46318183112.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/ligewofaposogofabugixewa.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3f3446e2---veren.pdf
    • http://aceonlinementors.com/userfiles/file/gonop.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/bf4782827508f3a5ca677beac5bc31d4/1907374568.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f668618762---85730427666.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/49aq0tgc07qh9heu92052qp34c/jipef.pdf
    • https://healthmatters.me/userfiles/file/gedoka.pdf
    • https://aplusadvance.com/naver_editor/data/file/gidofafixanelis.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16088ccfa58d1c---93367333837.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/n5mitgh92kac6b414i6j754ou5/difudokububaponapuboraju.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/af3a2710b7fcbf50fd98956caae2ba82/56701018006.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0fie25ce02e8ne4qfbc2lvoeq6/58952622119.pdf
    • http://wijnhuis-vaessen.nl/site/data/ws/files/93295255278.pdf
    • http://schmetterlingsgaerten.de/file/sitokitatukewaragodis.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a9fddfad1---15000852904.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/e29560ffa7b24627529184c00a2ebb9c/27245767550.pdf
    • http://amctop.com/board_data/editor_img/file/202105191935.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=all+fate+series+in+order
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016b1e.bin
6ee2b2c506efd21f49f2d22273b1b3817b8f773e512f1a18e3380a7e658d2d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1E 17784 bytes
font_01_sfnt_off00019915.bin
94cc9d200f995a44aef89865a1110c5e7a5898d83975a73e6473104110de263d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19915 2672 bytes
font_02_sfnt_off0001a487.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A487 16792 bytes
font_03_sfnt_off0001bc9e.bin
a396451dc712822ca1837934d712d35e957a7b9c280ec2d01a3ecc9f70aa7e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC9E 10328 bytes

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