Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e7d55aee207e3e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-01 14:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5dfa7dc68464f28591df7407b0cfef53 SHA-1: 9e7c5218f32e68aa9283c922ad968640853ea2b4 SHA-256: 49e7d55aee207e3ea751ade61d87afb7cc6e314cf12da03e86d947e99f20b83e
172 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various URLs, some hosted on compromised WordPress sites, under the guise of a 'courier quotation' or invoice. The presence of a 'download button' lure further supports the intent to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=courier+quotation+format+in+excel PDF link annotation
    • http://kiuruvedenlukio.fi/tiedostot/file/sepifetopizuvenajoguwamu.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f9f1269d---vuborigexoba.pdfIn PDF document text
    • https://euchebnici.com/img/file/5392331311.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/kometugalobunojan.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/lrvta5n76vpb3ghn4ufohsqv03/kobozajivafajunil.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff817b3107---67616141516.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202108291322292527.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/17176806192.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/if85m2j5rjb2iqpau2j5h7s6qn/41265716016.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/vkige36kfdcc6qp0r2cnt6uudf/tekus.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210901_022327.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fdead61a1---jotawobidawakowebivu.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/tumiwesegoguxakewijowag.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6bcf6ed25f719040557cb2ff08971083/79803912978.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/97a86ff98170d828b102b057b0be8751/rarenomutimiv.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/motuguk.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160805b2b27b10---karurolusuporosomibosinu.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/vigenapolurifugizukisojun.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/tubadikoribaxugafibabu.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/peburur.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/1675387622.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/61387621714.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 10708 bytes
SHA-256: ea44ae1d8d11153aafbd4fdb463d2d344b49e10bb797ea7482e1f7bb16c2b224
font_02_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 16180 bytes
SHA-256: b573873a5d0f7e33042e7878211873fa7b57481f4561e6d3178869ea34e99ee8

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