Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb018a4729f60369…

MALICIOUS

PDF

238.6 KB Created: 2021-06-28 11:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94c7e8bbc976e0cdafe089bb429ef117 SHA-1: 70762f55e97c93296cafc83f99d443d98a1f3fc5 SHA-256: fb018a4729f60369281c16f32b7b864086c6278fc73202f301179b1db677463d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains numerous links to compromised WordPress sites, suggesting it's part of a campaign to distribute further malicious content. The PDF structure and embedded links point towards a phishing attack vector, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ketchas.ru/uplcv?utm_term=how+to+make+audio+echo+in+imovie
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/45268b198b59af5b339c4d76cb055b30/lufamuzov.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/xarerijavesafetevadeg.pdf
    • https://viboot.com/ckfinder/userfiles/files/36895100381.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/7a2719d85d76e1ff4ba88440da9441f1/zomefamuvuwerofi.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/jlnd5oss8ejepsdggulj205lni/71878285814.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0db6f953bf---24911519067.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80d9544ff5---wefututibo.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/hp9umjp19s4oode2tm2886sj1t/24338389292.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8bd17471ec---buwegabuvedilexesafif.pdf
    • http://varanini.pl/userfiles/file/keripawujujepolomafofix.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/3867ebe531c059fa9c21d07021ee9555/jumojazileripuzoredej.pdf
    • http://www.aadhar-interior.com/userfiles/file/bojuluximababesatomi.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d60be2c9826e83410fb366aa6fc16b80/46059892147.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b65bfb8b012---59378960966.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d2f55a4cd---80226869027.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/09644e30d65964fe08a11476aefccfe3/jenazotoxiv.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1fd30dad3f92c80fbcb6e6afad10312a/zijatene.pdf
    • https://creteservices.com/FCKeditor/userimages/file/vogodezobuvagodidowumebof.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609286e71a70a---22895544683.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/41l1pvs4qd4tk2nc7btclp8p82/52551082325.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1c19430f4d7f333d2ed00f7b1fd15226/gogosoredetezitek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034dc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34DC4 16792 bytes
font_01_sfnt_off000365db.bin
b1a6b3f29970595fa096866cf182119844e0ab4696d6d3d49d577b8edef23eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x365DB 10656 bytes
font_02_sfnt_off00037e0d.bin
8437f7f66e1fe6c704978b092a1bd7db88b9e0361c76b87a0cbc4ac7bcaf967a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37E0D 17648 bytes

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