Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7600c07a82a84ca…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 05:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2dce4f11f62b3820c9856c7693b8cbb9 SHA-1: 86c3bc099c585f21477160bffd63cccc31b38f7b SHA-256: b7600c07a82a84ca9a58827217dc9dd0f775f0b0379d4afe243b24b788b6a3da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f0f045a6dc2f51ef477a9b68f94d29dc/gukilimi.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/325dd504cefef41d086b15feb1439e4e/32300742898.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/62185737590.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/21edd2f20b686214fe17110f11d18b50/14155860330.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/genaselopivagebatoronaz.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/21/file/15160842195.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/39172474368.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/korefage.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/womepepopawetu.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/bipebatewopu.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/dadewavibufuwe.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098376d4e99b---11035730517.pdfIn PDF document text
    • http://industra.sk/userfiles/file/96850625146.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zuzipazuvujizusasuj.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/63979064034.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850fe38c4d0---65463152283.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094781438132---2343139151.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/63221432569.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af69b24c23b---zopazep.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160723ce6cc330---10885368094.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3512cabbb38b27c96db450cbd17fa134/rekejorolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=after+effect+2020+full+versionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 10556 bytes
SHA-256: 65dac1a0302d2b7a398c027e31f83b667937180380c4ae6e93bf450db70c46d1
font_01_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 18736 bytes
SHA-256: 7d696517389c2601e156b2b8c851bf9f8d796a89e65438cb634403910fe4438f
font_02_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.