Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15d65d59352666f…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 10:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 73a1ab0937bb8caed49e3c233fb48516 SHA-1: 2866338eb276e342b98abb898505b5f26a9ecc35 SHA-256: d15d65d59352666f57f4ffb70c34c2e87c74bbaf947162c33a233c0b9886a21f
196 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and link farms, many hosted on disposable domains, suggesting a phishing or scam attempt. The 'Remote-support tool lure' heuristic indicates the document's content likely instructs the user to install or connect with remote access software. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious intent, likely to facilitate unauthorized access or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pixomot.ru/uplcv?utm_term=how+to+use+my+android+tablet+as+a+second+monitor PDF link annotation
    • http://fleshlight-tw.com/userfiles/file/dapuvetogemanemilasukus.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/nefeliluba.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c4fe5cb57---xanemeb.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/69932328266.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/tazinutedegawutato.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5e0216c6---62841785542.pdfIn PDF document text
    • http://iscelenie.info/files/file/38448159675.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/28947369861.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d59e83edae9f9b00c1d570b7c23265e/danitesaduniwo.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/22220213455.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/73697642838.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/jisiwuzaxewagofakokeje.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/36728718268.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94244377549.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/22231023065.pdfIn PDF document text
    • http://montesantangelo.it/files/files/35876178754.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/2197082948.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/54749169961.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6ed8d7d65---87449052904.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16132aad340d55---81485487876.pdfIn PDF document text
    • http://herve-coiffure.ci/files/relulido.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/52494666422.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 19044 bytes
SHA-256: 7de426a5026cab573c937ea88fc6e0785b6f99d4194badccbf2210c68fed82a7
font_01_sfnt_off000108cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E6 10960 bytes
SHA-256: d4a739a3bae221242d8db70ad93d55b78fb47f7320568cf67793ff1b0983e3b5

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