Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7992ec141d0109…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 21:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5c34e1a9cd1fe7c9ffad82b961f71922 SHA-1: 343fb1efbdf1bd331f5666f3efefbff4e76c8efe SHA-256: 7a7992ec141d01095282ac74565aaaa365d2d4570b6580381cd094752207146b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and link farms on disposable hosting suggests an attempt to lure users to external sites. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/928irjv46cmfr0ml69ibcdppf5/pipebolaserupujibememofo.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d1b0a0f9a---dajebazilonog.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/72306528036.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128cbcab4a8f---duzovajefisorubakuten.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/3651575692.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f1e88ceb---kaduzajivipirexuke.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/fvd0a670br2bsn0h9qbhmfab9k/12751750952.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/begiro.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/tscajksj565ab1p4651vtaq4ov/walumadotosodogavinewoxe.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/60599428855.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/bb552bc8fad8c2d1892d0e22cebfb6e7/gonuzoguxipiwipal.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/jofifoluwegapexom.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/nadozajalulemutejivakub.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0915b2c2736c24106de3512d4b487bc9/wifusozujuwegikukusu.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/demeroranasevufavasena.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/10150621477.pdfIn PDF document text
    • http://ndt-ultratech.com/files/24058880818.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fa4117b0d8dedcbe88a9064781d81f14/nedategivapefumapapu.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/lezisajunuvasamuwaduka.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/fusukexuvabemofenib.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5527b01c81---wipelew.pdfIn PDF document text
    • http://www.thaitofu.com/image/upload/File/marugofafotinolitoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=steady+state+ac+analysisPDF 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_off0000d51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 17936 bytes
SHA-256: 6b959efda8082f4dd835aff20b1756fa2502e162077aaf27bafe517117ad8c24
font_01_sfnt_off00010472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 10332 bytes
SHA-256: 2c28223669e52ce4ac632d8b43f3a6487c0197538ee095b41510f5526ac2b87a
font_02_sfnt_off00011bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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