Malicious PDF — malware analysis report

Static analysis result for SHA-256 a152a7294a16938b…

MALICIOUS

PDF

90.3 KB Created: 2021-08-11 21:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 786583db7397f53785a2ee2992eac2d7 SHA-1: 7e9d1d2921c77b1bb6119836288f0bf89827c10a SHA-256: a152a7294a16938b45426bff9c5954a22ada9d545102daf11f2ae11fdc2259fe
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous links to external sites hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it is part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/81c53f734547b8bd452c54257fc9e994/29390908150.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161030875b3a1e.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/98441771721.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/65536334702.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/bd06a5a17ccab94a4e394c3388472ae3/66019743868.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/rosudifokerakarozo.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/3cbbcf56ec64cc3a4afb690945cca676/vazagawefebitewez.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/jemolexakozesuselixosimos.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823b9d68a50---zalabidozukiwutuv.pdfIn PDF document text
    • https://voxel-avocats.fr/uploads/file/In PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/eb21d09ed1a06f514ac85c00e2094055/87019040920.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/jbv38nmk5i4h0at6odtee2al0g/tujozizaleneve.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/tsnsd1edrkiacvpqtc3kvppghg/23553136660.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/4el4hcq3ph28sdvreun827cmtl/98825302643.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/32994360275.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/f1ad67268bd1154471efc6dbf49cd863/sewoluluke.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/e3fc09c8af3a5982f3ba545c03503818/wodegefumapalelezot.pdfIn PDF document text
    • http://palezieux.com/ckfinder/userfiles/files/91348907521.pdfIn PDF document text
    • https://unosms.us/userfiles/file/fixesifasanowevibulojexam.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021517935183454.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c056a4a4078---66097533553.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098fe1675020---83275813603.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4786aee245---zajabizuxobusajokanotope.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae70d5db18---54039206035.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42da0647c---navuvugato.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ad5d4q2d4qehv7ech7gvji2efd/27091104297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+can+i+transfer+whatsapp+messages+from+android+to+iphonePDF 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_off0000f8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C8 17604 bytes
SHA-256: 1c17f0287a07421abaac806cf363f6aaa9bc91cbd4c36aba4bfd58b9cb1858ad
font_02_sfnt_off00013f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4D 11096 bytes
SHA-256: c56484cc60de46c672b2a377864bdac5e63d6bf499c769369b34c9e37b4c9620

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