Malicious PDF — malware analysis report

Static analysis result for SHA-256 f295f3bb70a0d5dd…

MALICIOUS

PDF

113.9 KB Created: 2021-07-04 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c09150ed606f9b597572b1c14d35fe5c SHA-1: 9a148da440fd83a8f0d8b90ffaa3b14cc961f066 SHA-256: f295f3bb70a0d5dd4934951e7fe6adee0ddb99e2b6e9ecf903883f3adeaf78b3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. This pattern suggests an attempt to distribute phishing content or malware by leveraging compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/lu1jsg3umo4cqmbbau1mhhstn6/bomularusufuwexazuva.pdf In PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820f36ba3b3---12432258174.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/sb4lur487af5tbbd26bq1a4js7/komepofifuzozovonezazeru.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0c1c83d3---wilulalefiw.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/74000429389.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/31a906f593e3c1c01f7d46b332b6cd30/pekavejejaturufipuduf.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f31cf43---49339817677.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/bofuruka.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/30418682253.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/57b083e69c75f3307e3f03de4abf24f1/majufigipumu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/0fad6e46cc28599d1073a3bb54d8251b/70095948651.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607475b581ebf---kigidizipojakozozup.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/68078704405.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95becf7a0---10775670966.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/tiwevogegerafonozufovo.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/puduripugobafuforigel.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/3i1inq577hs12o3g4j7hhh9hj7/74426419616.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/768b4db52d3ba24af92a5f5fcd407584/xutalesivupoz.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6416aaed90002c194fb58897316329d7/zoxema.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/69008949515.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a1bbe58fed60eb0d3496d437435c7e6b/16486811585.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bec2d09a105c3101ac32c5bacfd8c73c/rivos.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722d172d97a---98985129974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=places+in+cairoPDF 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_off00015c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C9C 10128 bytes
SHA-256: 386b1e26dfe7b7391c4f64b413ce572fbc56ad6183d475d30901318c23d802ae
font_01_sfnt_off0001734a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1734A 17536 bytes
SHA-256: 5b242870a1261ea5c4233da3fdc13357b8e5783a3049ef1f435c9f47bde675c9
font_02_sfnt_off0001a150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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