Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2631695585a7cda…

MALICIOUS

PDF

98.1 KB Created: 2021-07-05 04:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b133faa69fb157a63ccd5b28a250f6fa SHA-1: 9f7197f90d147f608b5e4d458b1fcb8751d04f0e SHA-256: b2631695585a7cda8a15d48f2d6c30eac97e7103433f723da2d58362664b3bda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users into clicking them, potentially leading to further malicious content or phishing attempts. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075247eccb0e---tunavuwelosam.pdf In PDF document text
    • https://alternativecarrepair.com/userfiles/file/jajazesokopubo.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f00cc3bb8---67178322686.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c753105157b---vokujemawopewuxoxifuku.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609789d5be860---19072075864.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6fd19f32b7a5dded36b37f6d11b19750/bidawovulonidab.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b99727cfbe---tiwigiwexinekaru.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a89287e753d---ximawajubalojipelinig.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/nmj98va49ge5sckigea9lgpuuo/28583305.pdfIn PDF document text
    • http://keacg.com/upload/files/15047725879.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/52022003998.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae55897ab---ninawibitezadu.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/67919238332.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/lgaug354dodmmfr9qbdcqps5c2/biviwolelibe.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39c0be498---24714689139.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/e4964b2022331c586e19e7e27efb7ff7/8257920234.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/51396533686.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccd91dc88---42902994946.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eea60cea9---baxelugorutozafejax.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/9jtos47f6t56sg6aeanm4uuc4s/tinepixuwapixalofizilobo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/c2e2e3ebf0cf40e1e327879da43d7c24/sejogoboloxezasoxanejo.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/suvimatusolofilo.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/08477ce88033ff6386c434cc074b8d2b/kazirobezanum.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0280fd692beda6c884ade47ea8a71213/61159353511.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/otg4bn1ncdrnla9j4ilqmqkurt/74198017256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=physics+notes+class+12+chapter+1PDF 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_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 10760 bytes
SHA-256: 9a89f5af812cd19469bf8abe85588de9c82ff88eddfdb3971674fecf2de5e8bb
font_01_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 18884 bytes
SHA-256: 3e1c8f91d199ea072e2a0709be11e6fb1116b7eb638e7d5643bd45d1a8dee79d
font_02_sfnt_off000162cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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