Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e53b658006988b…

MALICIOUS

PDF

100.4 KB Created: 2021-06-29 06:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cd8adc4458b694b1196a0a917944a38d SHA-1: 9c03546e384993b10bf183c2add3f5cf81da0322 SHA-256: 10e53b658006988bb06342105c5143b4ccc653c627dded0e4a8afd969a5c6889
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malware distribution lure, evidenced by multiple heuristics indicating a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the presence of numerous external URLs indicates the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://garglob.ru/uplcv?utm_term=cutest+dog+in+the+world+2019 PDF link annotation
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8493f15ff2aaa22c38f220f190cca9ee/tugupijasenerefixosidobob.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f61d39c3167719d4d13df90ed1fd3db1/nonosapowafa.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/50867153285.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8a8a286c0---70055197370.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a429f119900---rugapixawute.pdfIn PDF document text
    • http://texmet.pl/userimages/file/wijevojijawepifiv.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/27e6417ed74dbbc405a96480613a2764/54383793880.pdfIn PDF document text
    • http://epoetryworld.com/clients/53741/File/puwusewupos.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c43e8c2f12---42756180225.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81722cdc1---womuxufujozalir.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c6e970350ecd74f3bbd9496d8934bd89/gewomopizomadom.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3be51bb6662c9d95361fcdbdbd077837/tatelezi.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fac2c2e363---kesokumepobezonorejar.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382726d956---97491377878.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/81c27b0aabc25300b2957d6e470dd6e2/divunuxeguzapi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fesuwome.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/zifuxulus.pdfIn PDF document text
    • https://norservis.com/files/files/39057176119.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/xopelulabufetetu.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/65278cfea3b3db2ebc19da76e04cf40c/tarogoj.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/xadofepozotuzubuvebi.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/esp2c7416cuuufjlnbglk1c511/garazakaxisubadezanabolab.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/51499266521.pdfIn PDF document text
    • https://aedwea.com/upload/foto/funaramalejuxironedil.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000168a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x168A4 17320 bytes
SHA-256: 720c1f0a490d33e5b3a0367a870c4e5c2dd293f218a07234d3ea03f11a498236
font_00_sfnt_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001229b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 17176 bytes
SHA-256: e86ea7dec055548f98f0ec20db6006ac86c1f1278e5bc3a20eb9527690fa7b1a
font_02_sfnt_off00014f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F11 11044 bytes
SHA-256: 81c7c63d8d742704283cb5b7ece2f79d09b1f775fd771c5cbf76ccd7ba9837c1

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