Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedab747e7e26718…

MALICIOUS

PDF

91.7 KB Created: 2021-07-02 20:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5d2b94f6b00fecf9621aa8585c6e68f9 SHA-1: 554e3ff422d3e83c0cbeee45ee89f319be19f9c1 SHA-256: fedab747e7e2671875ac5a846074feab96d4b8a31c2690b0db0131bf9ec1ae6c
156 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting domains, suggesting a phishing or malware distribution attempt. The PDF's structure and embedded links indicate it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shuswapladystriders.ca/userfiles/file/77792789626.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4kdsivfb8o1026q49f8ldrabf5/bapuzulesizi.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/zukimepisawatolovodix.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/kaxabiziv.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/2b94fecd8a1d446a3f08490e2b275442/lopojofesax.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d18651b60d---dukanotezuf.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c95a474b---53193051800.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1845ac4f8b---vemilulixelajipev.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210519/file/16214060039253.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61427fa3f---vabawijuzum.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2d3797d5120948587bc194fb0f0241d6/pebivet.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/kaxurilisonex.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a316448d666---kabuxixufun.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740371cf083---75360665264.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ph0r2vt6dkkorbvttsckqvb8l5/76529336151.pdfIn PDF document text
    • http://recrute.fr/files/files/80011552101.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/df97c4317485ade3e10a7288e8a740ad/vexipiresimuk.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/beniw.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c900a38d241---dofazo.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/sllddbr3usq2dsopsp594o4od2/26522204828.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607592dc2a423---toluvigibalibevaji.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/madazafunutirofurugabuxo.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/35167483913.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/r5tld32ovql77ee5mmjifrsbq5/84805027071.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/giwojexajizogem.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/gibiwewopufinavavaxugul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+vow+movie+freePDF 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_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 10016 bytes
SHA-256: c45956d4aacb76200adba888824133da8d4eb39bda58e3f6a049421d3a3f35c4
font_02_sfnt_off0001369d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369D 16640 bytes
SHA-256: 20c9e806bf63a31addedb57515ab1c7bdfca2d9c5aae12b7020f654c8baeaea5