Malicious PDF — malware analysis report

Static analysis result for SHA-256 89327cc617e497e3…

MALICIOUS

PDF

98.7 KB Created: 2021-06-28 17:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1b2fe8fda1c7e4e826841b297f18246 SHA-1: 1509245cb49c35fcfbb08a13628798cee1362413 SHA-256: 89327cc617e497e393cebf1e6994cdc4969f96f60fcd5c70d94e1bdea7f02216
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malware. No scripts were extracted, but the structure and URLs point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983423ec78a---xalasezok.pdf
    • http://axwelindia.com/uploads/25546866493.pdf
    • http://aklond.com/UploadFilesfile///2021050201040726.pdf
    • http://msamerica.net/clients/873634/File/kuzuvewugek.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/84746068324.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/ka1fvrkj1g6r1d8bmmj2mr1pe1/jujipugoriwexazevojija.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4917f292dd---92422148900.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bce5288ebf5---66065883177.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4fcc6cfb5---10887721508.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081d4b4983ab---buzelanigax.pdf
    • https://adepotcustom.com/UploadFiles/file/20210430154645129.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d34b096ea9b---83752968980.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a849cfc68---91723160049.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/7c6e6db896929870fc7d042a742503c5/dilizaxuduxupaxajutal.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608b39d5d03f0---lexibaxug.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/62864673590.pdf
    • http://ed-web.cz/userfilesfile/vevivuxi.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d192e5ad425---roledujovowagomipurej.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/8151633518.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/17d057fc2f067ceefcaf52e294fd2321/72419324081.pdf
    • http://royalgoodviewresort.com/Uploads/file/53099085363.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=writing+task+1+table+example
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f8c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8C 16792 bytes
font_01_sfnt_off0001379e.bin
bc154a65eb922ae9df117a6a4e98aac180ac999e56325577145fc650ca8dffe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1379E 17216 bytes
font_02_sfnt_off000164be.bin
41cab8d2e78205be633adc3546493f25a95faa770fa6a4d03084cb7727ccc7c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x164BE 10856 bytes