Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8e657b189fff30…

MALICIOUS

PDF

218.2 KB Created: 2021-06-17 16:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9fe8320f87233bb46783bf8aa83ec0d3 SHA-1: 21421c9ddcaea0d71a98e273aeedba5498cc8b98 SHA-256: 9a8e657b189fff302511bf842bf064768a82e480b2c98f3ab969b3b3826f6dfb
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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.
  • 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://pjkconstruction.ca/images/file/lajaze.pdf In PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/gagofarulidagoribivaxuluj.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/2eb2e19b7b07528a906089a4420b7f77/bifezot.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/70095950159.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9nka5q59om44qf6m8oqcaar923/silalufuguloz.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/tlh9cba9ln9mq65ckvkf5it161/kibutanukomobo.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/bedegujoxikineredese.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f391a0031737ad58808883a2dea504c6/35530036872.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f9a5fb7a---gadavenovokebiwide.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc65491c79---86075908821.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/e3daef1cac0dc688f817e31b21c2b683/22229479698.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fddc0efc19---dulufojasawemig.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e6eb690c---ruwizo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c05cc7951---totaradupuzem.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/e90ggf5uvb89p7tpofd1bmda0f/43296837523.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/DOqCt-cVA4I/uplcv?utm_term=divinity+2+crispin+riddlePDF 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003230b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3230B 5148 bytes
SHA-256: 898721bfa58654fda86361c72282c2a3e40e6aae93be9740d9c5c6706fd2a16e
font_01_sfnt_off000334bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334BB 11168 bytes
SHA-256: 9d11a1e4a54f6a48776a72b005b2434731e2ea0706b31f5b6d414b5028db3f20

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