Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e259674fd81878…

MALICIOUS

PDF

100.7 KB Created: 2021-07-05 00:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf00c07c1e24df8c617953d6f694beae SHA-1: bfb97b226b67daf571af07b423f4b8c99d1bb9da SHA-256: 33e259674fd81878caa9fdcf5e6096f8d8df630590d30978dc10fe7b7c9ff5b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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 https://oniceh.ru/uplcv?utm_term=brand+energy+%26+infrastructure+services
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d082c26141---49215011547.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0b534dbf3---noruzikawenusenevabajiz.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/6s9lnd18mppsurkg0u2krbk5tf/70813576346.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5963f85dac1ea736547d781dc638d2b4/nukesujapow.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/vshgm8n60it8uh2j037ocvc76r/34594826661.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/618160391.pdf
    • http://jmdfhjl.com/fckeditor/userimages/file/vubumo.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845b437b436---fakojezedodibo.pdf
    • http://qiuyutv.com/userfiles/files/20210620025812.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f1b9e3596---8914965532.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074329e4461b---87215694623.pdf
    • http://adabaskimerkezi.com/upload/file/manogolozofubusi.pdf
    • https://alianzatours.com/imagenes/file/92690492464.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d47a4d820---kidexajedafifajokaj.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/75686646074.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/17611880358.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/90924588470.pdf
    • http://ymy-tea.tw/upload/files/zepejax.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/r74852srg612c1hhsblnntfdsd/nulokil.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf323dbeb---zojezozuzokevib.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7c792d49100a3af76fd580ff7064644a/88082927786.pdf
    • https://deltagroup.bg/uploads/file/45021141393.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160721aa794a30---23799390171.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/00c7287461e7f6311f6cc59a91b4e389/siwesol.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160804d716f063---18232079116.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/komabojor.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_off0001274f.bin
3a528d8d5613918de1e4ac5bb56eb55233bc0801d711f82168653a17258d1d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 10068 bytes
font_01_sfnt_off00013d8f.bin
d316398669733322f3bf97c5084b299a37f659f1d687badbcfc5ce5437f9a541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8F 18188 bytes
font_02_sfnt_off00016d73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D73 16792 bytes

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