Malicious PDF — malware analysis report

Static analysis result for SHA-256 9566272ab6c45682…

MALICIOUS

PDF

204.2 KB Created: 2021-07-02 14:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c03c4aab7ef915f304dcab7939833b86 SHA-1: a1ef5eb63af5a5b24837a3a2fc0c27b6ef22ac65 SHA-256: 9566272ab6c4568211ea85a6a8b74e6ace2ae2543d029971da4feb667ac3da01
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and uses SEO redirectors, indicating a phishing or malware distribution attempt. The presence of external URIs and links to compromised CMS uploads suggests an effort to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9488

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/5f98df6a8a0ef4e8aaa4213c243f6b06/62945279341.pdf In PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f0e498ddc9d2bbfffb6a0143bf1d90ca/soxejimi.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/jizibofepupigu.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f703eba8829ec076459d5fe78e774a48/bogavapulupanevunasudora.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/88d2af00b3e86a5fe9e95dd2df1cc9af/papowowon.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/39ca19d0bbb8efe06d764f3410b0fecc/pawupi.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/rijuwasukejavesigobojabo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608818c94d9b8---82201561981.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/verufogatikifakewuwuze.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609186ae154ae---63843662122.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9gth0pgim82c9t9oiei03e3gu2/tuneperilanunagimanerap.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/frshkhebpd2cv6ugl6ngf6m31s/99322438584.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bee13894f11---66688165726.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/feu54l66c8j1r721r0505r5h14/fepedelonaxawup.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/lufewowabikusimexam.pdfIn PDF document text
    • http://polipack.ru/content/file/27218544288.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/jasisozilali.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/3dbe2a4ab5c6b6436fa638ef958c900c/momup.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/wasuniwukukelobe.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/1051958193.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/qnm7jl25tbarg6qu469vr61b9p/golopolifimugezojibin.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c46e1be76---rotewekazojaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=effects+of+caffeine+on+the+bodyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A775 21660 bytes
SHA-256: 5009fd9dd25ffd80928cf72d78d73fdbd4823eefe1d9df83e152e7c1083017ae
font_01_sfnt_off0002dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6DE 10664 bytes
SHA-256: e787eb4d1c38696ab7e1179ebb0eb9448ccfbd20990b3e2e0118a2c09454d2a4
font_03_sfnt_off00030f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F3B 5596 bytes
SHA-256: 2bb8c487ae9e23b3d6d7e7a2057fc42465770b5422b95315a9605dfe5a2cda75

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