Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedd63d38922ff3f…

MALICIOUS

PDF

79.2 KB Created: 2021-09-19 02:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d47e2308b9080b68e35cdd3275e6e195 SHA-1: 22a09e8300744d3caf029a4464e55973000f228d SHA-256: fedd63d38922ff3f2773a96f3cc34b43e37b1829ce76924bfe2be019f6f6b513
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to various domains, some of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external links suggests an attempt to direct the user to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://alemotta.com/resources/original/file/69511700876.pdf In PDF document text
    • http://ucg-eg.com/userfiles/file/25232438021.pdfIn PDF document text
    • https://tierlistei.ch/downloads/pinetol.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/94048512746.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/84237775123.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/664d86fc83db22ea6cbc71626a6efd11/75307354089.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc52a65f44---kiwuwejajuwozebalube.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/9da09ebbd6ec729fc3ef40c766b426c9/tojala.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c966dbf98e---28136813040.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/83570962626.pdfIn PDF document text
    • http://4rrecycle.com/files/file/89070686076.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/78098167731.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330f95e8136---giwixubekupes.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/48137045009.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109062302179118.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/9147400495.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210914_115104_181.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfd7f64176---99411281100.pdfIn PDF document text
    • http://change4best.ru/upload/file/voxogofuruveke.pdfIn PDF document text
    • http://kelvista.lt/images/files/37379252819.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/zakepobitixofopapifugelal.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xegomabosabowabazukibe.pdfIn PDF document text
    • http://packamate.com/userfiles/xokexuxatefegavadis.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/piwuzitukoxonulu.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/wuvegifita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=download+moy+7+the+virtual+pet+game+mod+apkPDF 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_off0000d033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD033 11180 bytes
SHA-256: e16e05ef6ea26e5438793b495d1ceb4d018fedeac137e9ffd6c867b1ee29a52c
font_01_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 17344 bytes
SHA-256: 2e7fcaa033bca1468a1272f444c9122914f53f1a3fbe823a6526544d97edb6d1
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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