Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebd09565e3dd669…

MALICIOUS

PDF

84.8 KB Created: 2021-06-26 00:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bbd604fb6d2a12012a66b7d6c84bfd9a SHA-1: c3311dce39be8aa5ba6c0d9496153c04dd496a66 SHA-256: 7ebd09565e3dd669c2f47050be28055f99c87fc67739cc17ea84a6094f77728d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, some of which appear to be hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the attack pattern of luring users to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=do+sparrows+eat+worms PDF link annotation
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609210765e126---vexuve.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/17651223799.pdfIn PDF document text
    • http://fittbikese.hu/files/file/43477056236.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/neminaxitun.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021060210150633.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/lj3nmmpk1u2uuvncp055gnncc4/26161247047.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce7f1359d---welagozalesu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/koxetas.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7532ef7c5---88801923051.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16079efce81c9c---talenelubig.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/76233182624.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/33279941475.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/81107123917.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/gpjeo35s7u9kmjla8ier1r8teh/luwafidusan.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607450ef4fc93---28766229362.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 10260 bytes
SHA-256: 07019f73302f77427bdd14c9384cde4490ee1cf1cb5ecd8eba5aca47c789ee2b
font_02_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 17048 bytes
SHA-256: fde1f9fba8be0c59bcd82c32be24a75eb2260e2fc0a00588f6589a863319d968

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