Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad95c448d02cb58…

MALICIOUS

PDF

88.6 KB Created: 2021-06-25 08:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0f117f8d68a862823a7ba1d78a2e73e6 SHA-1: b50f4cbed36ba48f08fe89d44b1e977390efb38a SHA-256: 2ad95c448d02cb58de79d37cf165008b017f8841036a7a1e5adfe7c729af0b26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or a trojan. The document body, though heavily obfuscated, suggests a lure related to a 'service manual'. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing campaigns aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160776fecbf5be---livisexufiwajet.pdf In PDF document text
    • http://a-kamen.com/userfiles/file/94798948323.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210612_FE07EC0829B2D9A9.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/45986064631.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/9b5029d4eb4de2294c03b00b18729d41/miniweburuboxa.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/n3qtjoqucqevnl5fu3pnis7keh/rigunowenapekep.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/pipatasazaruvi.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d2f3c2da0---sapezizusimopetujivugomes.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3c2513408---56407297579.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/79a452e452f044cb8d4c4b7ab5bbdf39/68973507136.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021052706170393909.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c470333d6e2131e742cfecbcb1baa622/59901710869.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/jabolefaviluje.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832b48451f8---bezuzomagozuru.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/apje801k3sjjiv5qb8e389clp4/8379821602.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=cdj+100+service+manualPDF 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://scripts.sil.org/OFLIn 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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 5684 bytes
SHA-256: 22f1f8a1b21539e3826fedee0f3d8d78f5deb6e28a46c86aeea30b4e5f89d8e9
font_01_sfnt_off00010248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 5320 bytes
SHA-256: cc55cf7a8b00984c81cc29ed93a61c1b96815a1140ddf2e58d508e95ab261495
font_02_sfnt_off0001144b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144B 13724 bytes
SHA-256: 7d5bdfeb89f3099fa62b5ee795ecc0a3464ca03a5f43f8855f8fa45fc80925fe
font_03_sfnt_off00014015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14015 16112 bytes
SHA-256: 116e1aefc1bdc9fdbdc8bc4ca32ed8fc2a9096b6ae60b76e258fcc2d5524df3d

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