Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9094292c4b10d5…

MALICIOUS

PDF

71.0 KB Created: 2021-09-07 15:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c1932395dfea8c3bc66344bcf67727c1 SHA-1: 91c721543526cff11f12e3498c4a5b01a515bbef SHA-256: bc9094292c4b10d52a3a4406b1382886d9c29a745be4510e3d91420d038f11f7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to WordPress sites hosting PDF files, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/1ac9769d0ca5f4fe105f7b38d14bb575/guxowawakinidokeresubajog.pdf In PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/domisegufexumo.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/56b0f5b7f35afeab8627cb8c0a053d52/xudosekuzax.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088ecc8cffb6---5155585961.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/34874617115.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/vubufojeduwawef.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/50326934800.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/50676959ed20c168dc86141698d53abf/71811021757.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/fegunagofixuxekusej.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/bcb4264b6e491271b4d444db9be0d77c/19047037586.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/66748086846.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/zazigatiseturimef.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/12147439618.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///pojemifurepazerobexira.pdfIn PDF document text
    • http://strandedtattoo.com/file/sisogiwivaku.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/822m6bi8u6mihnm8h1s4n5vosl/guxafoguw.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/6943143324.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081c20b5ca61---tupagupobefivoj.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/xumopiwupafexope.pdfIn PDF document text
    • https://www.gcnaura.in/images/uploads/files/85387744740.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f396de1b0dc2c17c0fb4c93eabb8ab01/73409143772.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/xazunaselijel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=waves+and+electromagnetic+spectrum+worksheet+answersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53E 11300 bytes
SHA-256: 6b570f3af75aedd861dcf9bed1ed092c3221e72a76c0e3074eaa8c8d933d2905
font_01_sfnt_off0000cf6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 15060 bytes
SHA-256: 2e1fb5a0f7b0fa7741adbe2048f92453fe0a899fecb1837b09b91b2cf6ed9926
font_02_sfnt_off0000f5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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