Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d3e14d4371f43f…

MALICIOUS

PDF

77.7 KB Created: 2021-09-08 09:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6b1260d960f5f7c5f3192abbb0bbbd20 SHA-1: 8c3c0392a02e812b2ebe89cbf83727fc1e57ec89 SHA-256: 59d3e14d4371f43fe724ab70400f2ae35dfc6fd4ff3846e4f5c639b7fde2f1a1
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of numerous links on potentially compromised infrastructure suggests a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://hogies.com/includes/template/uploads/file/xizajazadadel.pdf In PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/jadepowatojukiluroza.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfc970f69e---bepig.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/94057157420.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/8ba855d62170fa004be87826e95a0ef3/nijiwenenele.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/tijubigi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c310921d02---65031833358.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/57964584136.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00046ba3ba---40664978409.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/jenodibuganevikereli.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/33840558143.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vadojutakemelinazuge.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/84851501335.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/nowopijoko.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/22060174223.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/63272399035.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92282cdb12---42283891520.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/on7fgah483g0nvqu4598qkcrtc/15594199664.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/lukotedew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104295a54cef---wuxapixet.pdfIn PDF document text
    • https://xinpayflow.com/ckfinder/userfiles/files/3220674554.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5b91606e3---76834196167.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/444cefd218f88c9516e8f1dcccd633d4/67352660970.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/wosawowebiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=voice+rules+chart+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_off0000cbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10680 bytes
SHA-256: 3a66f365b5d2e0af4350890db13096f9a8317e38e0eab4eead1b95a0b701ce33
font_02_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 17496 bytes
SHA-256: f15b1b1dca6d7ba8b66db981c153080d9636294e92f58a6534bc5b3113c5de34

Open this report in the interactive analyzer, or submit your own file for analysis.