Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47f4ea8117a5f52…

MALICIOUS

PDF

78.4 KB Created: 2021-09-02 12:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6b51301151b59d962370cb8f2376947 SHA-1: 0be27cb704f964f5226677f1ee87af5ba9834dad SHA-256: d47f4ea8117a5f52f6112e85652332711583b28fc589382db52d4c765423452f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous external URIs and link farm patterns, with many pointing to compromised WordPress sites. These links likely serve as lures to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/464bb823bfb4396ff6e9f5c99113d099/lelusitudela.pdf In PDF document text
    • http://h-n-s.net/userfiles/file/pezukinigikelurozorogolet.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/katewapitavit.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/935ad0837dc255d524d9517939fa6caf/zolozolevemed.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160804c3ddbc06---memubado.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/simudojawuzilijizifirepi.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4f50dedba4c729af5d7c13a1dcad01e8/bijuvixigizafibe.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091044a35579---91072050386.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609871d90e869---xokuxofojewito.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/59769050185.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/gefobivuro.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/654dca123043ee79d579d33e9e3729c3/tikofoputopop.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160beb6b5bf7e9---9399321670.pdfIn PDF document text
    • http://rcot.by/pics/files/lixove.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c1bf658f1---vazaxemaroxapakasop.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a891489413e5cc1e91f8ae3d078bb80c/natazetaxaxatudako.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/25303074116.pdfIn PDF document text
    • http://praguetransfer.com/files/file/94229821782.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/33796065095.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31cc3d759f---pizuwe.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0df1526f90---lisexexinazebumogenu.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/xavorowunos.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/jofixeturagajipufazizali.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c06a11ec9fd55f98926668dfec72b81e/dugorup.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/22565553749.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/87905185088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+convert+pdf+to+excel+adobe+acrobat+proPDF 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_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 17932 bytes
SHA-256: 0362655fe1fc41316737cb932eb76d6c70c2db1235192e3e5991aa9243fa60b6
font_01_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 10740 bytes
SHA-256: 1057fc0712d722c9eaa2bd8ce4e8f8ba42bccc3c82c66dc8f4dce5480103becb
font_02_sfnt_off00011339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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