Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe8b1a59e59b56c…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 23:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2d2c9c175a1de8fe36e661bcba54d49a SHA-1: b18570d562f4afa00c63c63befe38d86cf07cc57 SHA-256: afe8b1a59e59b56c3a6a54737c08f1fd6599011ec9b1be520c5e15dab9da6e2f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or exploit vulnerabilities. The heuristic firings indicate the PDF acts as a link farm, with many URLs pointing to potentially compromised or disposable hosting, suggesting a phishing or SEO manipulation scheme. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://metricgroup.it/uploads/file/74333464457.pdf In PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342126bdb06---rodapavilo.pdfIn PDF document text
    • https://advik.net/userfiles/file/6658205232.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/lijugoganeter.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/30914695343.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/61699489126.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/powitoxabubarurujigameju.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/23289206020.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161325d8492090---93520947983.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/godazilutopus.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/30922766688.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/nurejovakagilipututok.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/1540360704.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/tinorozibad.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/11801085050.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/24237216785.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/voxezijo.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/gijigop.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/pefofetavivele.pdfIn PDF document text
    • http://videlec.be/ressource/file/25607114289.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd2c57c00---82780314698.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/nigawudipuxoxapodeb.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/bofologixopajenar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=iphone+12+max+price+in+bdPDF link annotation
    • https://lapdonline.org/file/patewakugizoduga.pdfIn PDF document text
    • 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_off0000ccf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF6 10832 bytes
SHA-256: dbda97555b230f1d4a17885358f65ddc9e1dc9eddabcd82fd8a2f52fd473a40a
font_01_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 19568 bytes
SHA-256: 855b3466216ebd3573adbf986af31a9af8a484a596ce5e77ab4a4323c5bff9a1
font_02_sfnt_off000118ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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