Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab0e2c6a191c04f…

MALICIOUS

PDF

96.8 KB Created: 2021-07-02 11:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9232dcfe5748819761ffacef07d61145 SHA-1: 255e862a71a09198dbc9c6df7e4f6a66d44115cb SHA-256: 1ab0e2c6a191c04fd2e60c2da41f86deceb3ca698ee882843f32e5a649cf80bb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://drafthe.ru/uplcv?utm_term=adobe+after+effects+crack+2018
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/00cba1c6ed0c26545a52a37187560436/momezosunike.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ebfa2f3e0---32754183960.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7d87b56aa275d5d076664171a13338b5/mivepusotuzigoxexavigeze.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/50185265901.pdf
    • https://pachetedeturism.ro/images/files/55722458931.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/zufobizirewik.pdf
    • http://worldofpacifiers.com/editor_uploads/system/files/xajub.pdf
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/puwulexe.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8094a0035330ad1d6d91cb4390d7e1a/falujakaxakeriganimesuwif.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e59fecdce---bemosurutiwoleza.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/70fa04824f0e7cd2f0cada9daf34bab3/4622025859.pdf
    • http://ippon.lv/uploads/File/fajepagudaganakud.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f72adb02e---62284151476.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f7024678---18061233947.pdf
    • https://grandhotelbulgaria.com/userfiles/file/77229181266.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e76179c8---69981655953.pdf
    • http://kursadowicz.pl/Upload/file/88119482907.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9a0973e4016284dc4a507f8701177eb2/fupaxorasemijal.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/36a64d97fd347730d051b07b22462b49/3989408558.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/37787c330a7a8f0d8e012540d862276d/80347376596.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb536c8821---vuxigad.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/1cegp3q9mao5ti0ji74kfrjs25/bowutulapinukuj.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec6c5e7452---godapizewewa.pdf
    • 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_off0000ecc1.bin
955c4e64d7e5b7f05622494f419d86f87433286f16dcc3f8353c454a8b67e35b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 32656 bytes
font_01_sfnt_off00012c20.bin
0e1d548de30e2e702e84d20547152c4c21d82c22ec3b79ba52bf968e8dbb9183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C20 10944 bytes
font_02_sfnt_off000145ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145CA 16792 bytes
font_03_sfnt_off00015ddb.bin
2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDB 16204 bytes

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