Malicious PDF — malware analysis report

Static analysis result for SHA-256 502155f2527ac8b5…

MALICIOUS

PDF

59.9 KB Created: 2021-10-03 16:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e597235d2b0ccbdfd838d0be66433950 SHA-1: dc62e8f6d86cbfc35ca08de395740a8d9f126b0c SHA-256: 502155f2527ac8b5cb35d6a7755d7905f4edfd518399dd4db6098aebda3b00dc
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous external URLs pointing to potentially compromised WordPress sites. The presence of embedded JavaScript suggests an attempt to execute malicious code or redirect users. The primary attack pattern involves luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4969

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbdaa4e94d---nalobovaxakup.pdf In PDF document text
    • http://redigonda.it/userfiles/files/gupuse.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/97996293227.pdfIn PDF document text
    • http://cga82.com/admin/File/lajizuvelom.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/40295270925.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/sawebesakerikopaxamij.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/boxerebaxedime.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/864a9af3864cf320a0be737db15e899b/kosakakap.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/fu96o5nfepjt32lg7ii04pseum/sabinugatapokopibiriw.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/wuxefevoguvigoru.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/49583218775.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614afb3224610---koxofosebow.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/rexabopelalibagamifut.pdfIn PDF document text
    • http://0048.pl/48files/file/kumirufemixilezodot.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/55452733494.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/60420410257.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/30457511145.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/weweluzifitenaxokap.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/gikopowugaka.pdfIn PDF document text
    • http://kant21.com/userData/board/file/68665924201.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1a03c3002---48485906832.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/salalukixegebezibanegem.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a786e612e---roxilutoxitovotajife.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1561349831614c0240900cd.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lost+in+blue+play+storePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA43 14440 bytes
SHA-256: 9ddb0fa80a5d06081bbbefdff04da0a00fc28fd47e5f94a56f0f722d58badff3

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