Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff7a96ea840e7a7…

MALICIOUS

PDF

78.9 KB Created: 2021-06-26 01:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 303221b7284803abd1f5813931ed9014 SHA-1: 5e904dcbb6377ea25d8cf73978803dac58632144 SHA-256: 9ff7a96ea840e7a7d03c30bbdf3a88ea81276475afaf45592c871c0817eca741
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a farm of links, many pointing to compromised WordPress sites, likely intended to redirect users to phishing pages or malware download sites. The presence of external URIs and link farms suggests an attempt to distribute malicious content or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crysiq.ru/uplcv?utm_term=seamanship+in+the+age+of+sail+pdf PDF link annotation
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/3c404fd96e2ac571bc3c6d90ba43b97b/telajenu.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/21127886623.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6790b3db512c129bcc8a9c2894216a87/61688372492.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/barimenoxokimikaza.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/32052133598.pdfIn PDF document text
    • http://yuhongzg.com/d/files/25894373315.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/138f38f2c023fa9fa76a5d85c2fcfe81/gutusu.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db61f25f9---89305605828.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/19271825493.pdfIn PDF document text
    • http://stl-hk.net/userfiles/kumunogo.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a922175662cb3bf29814dda3ddbed4d3/kevarafepokefotewe.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3747d4e3a8---sovomusitilofa.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/70235817539.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/sidu1nte9p17113ahas5t2c0n6/5708283418.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/916106cd4bc1045459819172fd0d7a26/44694587017.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/69237387742.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed7995f3041f63dd1d44cb1de80b738f/pujike.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/13499621125.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/q6cpsithh7ot157e43navtqo0v/lubadebemiberitufapezo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860b071b314---xovuwijamufamilefagafini.pdfIn PDF document text
    • https://emmaushuis.org/pages/fekomemaxisuj.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/dabogumevonuzisowuzo.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_off0000cf3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10920 bytes
SHA-256: 2c9bad3d06903760179253db8295f847fa7578c70caba1226ec3162b1302bfe2
font_02_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 17912 bytes
SHA-256: d78bfb0a0b976e30ae56079898a5641c450c6bbd6e8cccbed1d5d0294cc4ad1e

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