Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5f17f932588d8…

MALICIOUS

PDF

92.8 KB Created: 2021-06-28 04:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 24f2f435b25f8e2e4d19ab6127c18f3b SHA-1: c4fa1bb22199f0906298a98b269185befe6cb7cc SHA-256: 15b5f17f932588d8eda60a16dfc074a2b592c249b3b0bf6dcb4efd86b527fe77
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites, likely serving as a link farm to distribute further malicious content. The presence of urgency and download button lures suggests a phishing or social engineering tactic to trick users into clicking these links. No scripts were extracted, but the overall structure and URL findings strongly suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/uplcv?utm_term=export+confluence+pages PDF link annotation
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/j0oer7vfp6dmutth426loiu98v/gajokajito.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/70603264689.pdfIn PDF document text
    • https://digireg.pl/upload/67065908720.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0b4b6461---topugowumedetazilibidemo.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/8e75ded1ec0107e433f9c3e8dfabd064/dipifil.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba39fc333a---20735290492.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/zarog.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/tozonukikejul.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/c651a031f4c67c0a7ef4a70c11aebdf0/mibefuladatijojawabiz.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/33cda5ce078e6c2008a4100a8572d9b9/gixejefutibidapil.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083041407843---65578120696.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b218448ca7---17468314463.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/vinemi.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4d7c4e1716d81e3e749d0fc5eb8e15e0/15469537490.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/998baa628faca7006c02858d39309367/13717123746.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092c8337b778---lipasubibadoju.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621381898.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160868c88edf0b---27897836388.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb0bb22a80---tabib.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2e9362d14587fb0d41556a9479f33780/kadurusumiw.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-3/20210503085947248908.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/jj1mjf57joolhvjpagjvp7d60i/nanemakobewagiwol.pdfIn PDF document text
    • https://amblamy.ee/upload/file/towerimi.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fbeae59f---resuxuf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 17348 bytes
SHA-256: 66f3e0ec151767998ca5f47722ae01dd159cdd6d1c06e6304bade36a5f5e4b11
font_02_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 18648 bytes
SHA-256: 98f8dc496d3ae0dfc82b164773f2db70fb821b662f190ae64e991637d5a732ae
font_03_sfnt_off00014c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C61 10748 bytes
SHA-256: 02a895fedab2fecba641c441b7fac1cb8a9288a2d44599ce41f694e51de06af3

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