Malicious PDF — malware analysis report

Static analysis result for SHA-256 518d592dddb31673…

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 11:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e095b9f3e2679ee36293d1332343a8b2 SHA-1: 769f5cd161b25aa9c832cec9a12c30ed8fd5abec SHA-256: 518d592dddb31673632631380e3f769e4d4ce363de2beb8e2ce08741e560941c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=siemens+openstage+40t+phone+manual PDF link annotation
    • https://noddy.nu/images/file/53467381571.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5492653e07---92873884480.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/topilarofaxatejebofige.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/480275871609c537da9ba4.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/jitifudoxagenep.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1ca9d02d84a396fafc5efc35d6955dad/dalupolupuxupuvejapuvagi.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/6509997052.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4a5d39058d38cefd42bca7d6d8768870/sopuduximose.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/46086968406.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/f8b9e29bf6e35dad718369631d4a5a26/40606246252.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a467bdbfee244d0cd1a638a9b5bd7eb9/28472330925.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/nibolupudulazinilub.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088441c168f4---73140933568.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/dad903d1424926b2fb6eb28a888117a5/34696435467.pdfIn PDF document text
    • https://petala.gr/userfiles/file/62402396785.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/venewugawinexujajavivozak.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16108af4930102---66272072423.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/wufuk.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e5c8b4380e---tugoluda.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210618161542_s3x7lu.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16240870090227.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0385914bc62c3163b2f24ad073ddc596/26673180299.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/lufirazexusemufuvabegosu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3c0e2409---52752491311.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_off0000d0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 10976 bytes
SHA-256: f77df7ec01ae6770a39e9bffd66448933644368876b7dc1ca2214035562a659c
font_02_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 17524 bytes
SHA-256: cb3e7437c59305cf138049d43a03aec912fab524bf48dad3d91f610e95b8112e

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