Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f69c0050298fda7…

MALICIOUS

PDF

75.1 KB Created: 2021-09-01 11:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 150539df62381c41e8708be1519bc941 SHA-1: bb3157977187a642c068a46021b7e3d9e85114ca SHA-256: 2f69c0050298fda7dfa067928e1808d1f1e8871a64b2f6b09ccedfda5d6348f9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://world-system-packet.com/userfiles/file/12476417859.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f092456067d37d4aff39084bcebde9d6/kawukapomotitesuxapenuxuv.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/26080446826.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3e2266e23---42778127415.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/17971473311.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf307ac5fe2---23556939138.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/busesilapoboragewonuginum.pdfIn PDF document text
    • http://safarang.com/basefile/files/96033883126.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f86920132b188566d8dbb3e66bd89dbc/fakokilo.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/31153941628.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/sejufetunosavagosafajijom.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ml2gbnuqqhbnib382rovgq37ju/fidapugevefanovekaxolu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e563c0a210d---zuselorudagixedamemusak.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/nekapejenamefizepokagod.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/abkd307pilkm4rm9oefiojrm60/gogef.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/rowenesurevexetemokipaxi.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/towede.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/34kume69v4kh0jdenalmd29cf9/44763240128.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/27aab9eb9584c9502555902ada586181/1306454988.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607952482f988---molunigovuweko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=typhoid+and+denguePDF 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_off0000c232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC232 17028 bytes
SHA-256: 70ec78eb834c3243d440958d8029026e95f18129f384a7d2ace2baf34a09e0f7
font_01_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 10436 bytes
SHA-256: 368133f65b8772498f5aa86777ded3731cb6d577b8617152ffe6616070b1b42f
font_02_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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