Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e035ddcfec3e45a…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 03:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d9308825b2081609baffb59ae081fc1c SHA-1: 84c76c58aa5ea3567bf95b5c0ecc556d33672da5 SHA-256: 0e035ddcfec3e45ae1fe0f069a545db3182d57340381d472e675c68a99593fd9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised WordPress installations. These links are likely intended to lure users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a985387a3e2---mujajorirerabatitogodes.pdf In PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/48a0fbc340daad174f532eba04f65300/wiranimetakijubuvip.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/49278566491.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/mudulilekig.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35e16aa3eb---romimime.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b048a93109---45661381010.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080c02e4fc4b---88151288198.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609830dc4f6b3---jofuwodozedudugomepiras.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bbb162a6---wukewupumeza.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8f6b8be6ccbba39c1b754093f8f15007/tizizedatutazigolibe.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/litewadidodevifebun.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/44844452097.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/72697007021.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/42fa3bcb4019e83085460b88aea1f546/gazojaduveneg.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45cbe51cc---jazurogagoronu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f4ef55b6c---kabuwoxifebazunutemapabav.pdfIn PDF document text
    • http://akssert.com/userfiles/files/musubizunejizeka.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/78536319106.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/a9793bff04797ce4e9f7a6b21c45f241/raxofutemakokupixokop.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/45fd1d5c3f8a5bff033a2b1b1825e9e1/33706516592.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/85314319398.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/52a30082c421bc43f20b1f6445810907/ganosezobir.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9f5afc4b---bigagitukidosodolinawud.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/b8db3c7caf9cf1b718114eff274c9918/meximatenamefuraxiwuzu.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/miworiguzoxufusedutenazaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=supac+guidelines+2019+pdfPDF 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_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 11112 bytes
SHA-256: aace57e84c98836290cda02ea51c8c7344b5dbd406b672cf5e2821388c02ea5d
font_02_sfnt_off000121af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AF 17264 bytes
SHA-256: 18a4b6036cae6c1c271048496b50a7d3b028bc3a2566b46853f0cb4be17f733a