Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e157f7b6c20151…

MALICIOUS

PDF

86.3 KB Created: 2021-09-06 13:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ee3c4c519416033c56c1477588ebc9be SHA-1: 7a00327c5a4387dac1a9b9b3373b2ad2b5ebb740 SHA-256: 60e157f7b6c201514135e4ad557c2aa40b628bce950b0fe7f75fe04331d361b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://animationcoach.com/userfiles/file/68369142294.pdf In PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c4e1e9a25---34064605950.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/83073596223.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e4d517aa3---98462577406.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/5q2mtefq6dqjh8lng2iurmgcg0/lagetuvaw.pdfIn PDF document text
    • https://nic-n-nate.com/files/files/40537866187.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/tavibufusererimiwaru.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/purifilobuvad.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123e5a131a---kudosawovebi.pdfIn PDF document text
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/kusilafopalab.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/besubokisibuwatifopulin.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/54036101485.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/gixoboximemuroranasoj.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/23050310393.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/wowasimobekuvuvajolevup.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/biv55hson5qp0eafuosj6f313r/sikunabavadibivivaxunilak.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044ba599c7b---rotope.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/tawarijanewosogiralawoxe.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/q28u4jq92472dmh1s0s78v3gdh/guzojolugibixe.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210703054829.pdfIn PDF document text
    • http://beiks.info/public/file/3213272696.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbe908c61---renuzijonoredorironub.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1af112814---98833790927.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/rumote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=cricket+umpiring+signals+pdfPDF link annotation
    • 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_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 18108 bytes
SHA-256: 92c897a56d07dd145d6a8f4627c9afee31542ab9f879093448743963e9e19d5c
font_01_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 11064 bytes
SHA-256: ad4525bbc81cd03e8d9436338b2a5a9edd82a68692d6550aaf9033854ce8cd35
font_02_sfnt_off0001336f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1