Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fac9e96ebe80c2…

MALICIOUS

PDF

211.3 KB Created: 2021-07-01 23:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3678b0ec1e2016d3df7da68fef0d81e2 SHA-1: f535e71ab686eeb28219ad898840a5f1ed51bfb9 SHA-256: f3fac9e96ebe80c20ec23a1a3b75e8b16b5f5c4b0be0dcf5a3748c64523c40e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, identified by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of these links strongly suggests an intent to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9836

Heuristics 5

  • 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.
  • 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://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/974de21889c1cfb3fc697bab0259fff7/57607921456.pdf
    • https://b2cexpressdemo.com/userfiles/file/73502457569.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087001e1bb8c---93107651868.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1ee4ea1aa---57881450011.pdf
    • http://sarlampa.ru/upload_picture/25964551594.pdf
    • http://al-bandak.com/userfiles/file/72247939538.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5c4927064239f35de981cbc03eb546ef/82570084355.pdf
    • https://pindimana.in/uploads/file/45898899672.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/e42106633ce6a7bdeb81b3e88c62e1fe/3110796237.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/f2fc9a2fd5203338d5498148239f40cb/83248866815.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a5a1cf482fe0c92f779e48ac8589639a/5350699682.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4423b873fe214632115c851eadff4ed1/25321244422.pdf
    • https://steklo-shik.ru/userfiles/file/femovavudew.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/moraxitegup.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709072f4144---sosivigisoxifaridep.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b43d44c648---pojonujesize.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/pobarakibajorilu.pdf
    • http://agro-partner.com/Image/files/76735754575.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c675509aa979fb1a68d0e1fe152a1edf/91282054602.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c20e906555b9d972c0c3efcfa5751988/sezafitudom.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608674a8512b3---ladifepiwum.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/702d72ec90b608ec9b131195379969dc/gidamaxezaduwu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+marvel+universe+in+chronological+order
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bf48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF48 16792 bytes
font_01_sfnt_off0002d75f.bin
8286fbd7457dd8b2aec21faa354a1eaf5817fc70dc32d0f2e02ee25ff5d42170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D75F 10848 bytes
font_02_sfnt_off0002eff4.bin
4e701f6defbc61f5bc662b8f71f99e07b98595a65b0e7c84d3d33ade2df74dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF4 19284 bytes
font_03_sfnt_off00032245.bin
0417e0853dbe4cc8f2d7df5ab5686f96dcecf468b83bab4e96a44f74f8ad74bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32245 8748 bytes

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