Malicious PDF — malware analysis report

Static analysis result for SHA-256 9920abca909679a7…

MALICIOUS

PDF

106.0 KB Created: 2021-06-27 19:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62696378d2139262d75eafba4dfd6c9d SHA-1: 033137d9a035662bb2dd99525429593c692f9e59 SHA-256: 9920abca909679a75ee6b3b653a5170d993cb548eca3a010370af361bf7abcad
156 Risk Score

Malware Insights

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

The PDF file 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, likely related to phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa50277eb---93268037171.pdf
    • http://diversecityuk.com/userfiles/file/suvusasowud.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608818bf4cd8d---vobopunovukiwajid.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/29700118165.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a1539b4d4c9---xinivanunepitamonu.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/33498564758.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/qa30t2492atdr9l0i2l2o8i1aj/71303871558.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/jqmj077tg72hreim5itfe0v2m5/xogubiputexokuv.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/27253586155.pdf
    • https://faceless.me/userfiles/files/46263747089.pdf
    • https://agatanorek.com/files/file/9719886337.pdf
    • http://sieuthicayxanh.vn/webroot/img/files/50801379267.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c9d05ccdf---sunajiwinekaxokepegoputam.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cba1942d7c5cdc2349fbb78b069e7c0/rekotijiwajepozepovosoro.pdf
    • http://aldo-ins.com/userfiles/file/kewupesudepeboda.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/16fe9fa1de9622ec9ff143e70b05cb73/povaz.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3c3ee80f---mebakusuxitalanu.pdf
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/61101108126.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/m7pqb7irnu8k06cq1njfimsk76/45313006916.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/615g4v1av6ujtsd3e55l3abopj/96937097363.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8923d2ae9---sokotazojupaj.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62b60ef1a848e051e2b3e60d8b2d8276/551178513.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/a9ab65173b2f5f17efc5ea3c2c5d317f/62049476978.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d372d04ca78---49578551461.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/amker57dgj8r6fd7hc719p6kj8/siputivolageku.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc66f53d59d---juvinegelugavegume.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6929caef5---vilolefiwebowu.pdf
    • https://htddienstverlening.nl/userfiles/file/60683127922.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=gina+asthma+guidelines+2010+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013928.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13928 16792 bytes
font_01_sfnt_off0001513f.bin
af01069499283d1005371a703e309dabd337069220678bde903ec1868b4e78a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1513F 11160 bytes
font_02_sfnt_off00016afc.bin
4d35fe2e9c200cf56b9520b8179a880b40c0ecaa063a1f47614a516fc3b88de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AFC 18084 bytes

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