Malicious PDF — malware analysis report

Static analysis result for SHA-256 01182cb83edf7f06…

MALICIOUS

PDF

97.4 KB Created: 2021-07-26 19:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dade7859388d5e576bd387c585a9826f SHA-1: 5f23ded104fc4872d43ebf8cc9b1ce5e48e96c6d SHA-256: 01182cb83edf7f06edf933f2d538f07299aef5eac1caa3f4247719725ad341e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa62c84e1da---31156867038.pdf In PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaf4f64ecb---22780036423.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f56a51472bc12cb261cfb58d992cea76/vewupetegufito.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/91979297447.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d08f5a7736f---dibezajokitowisabo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b19a8ac36aeb028880c119c441cfce5c/29775622511.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/7319489219.pdfIn PDF document text
    • http://7linc.com/uploadfiles/fckeditor/20210725/file/16271581418242.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/421b83863e6077af9ba581dbe661428f/53501860294.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/56551e11b2638c2b3ada8ededf35f748/41700713881.pdfIn PDF document text
    • https://noddy.nu/images/file/dawatatis.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607587d9410f2---wuvesunepirimamozexoge.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26f38e08b---8644466702.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/5qpejuudqqr8dpu19nfj4bbbcv/31129278201.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/futajafibujuvilikoxogi.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607578a0c3a54---55081553026.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609cefb991a43---74539573646.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/tojenifad.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160718764dacb6---mofufadopoje.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/fujiwurenafizixug.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ae0877981155e2cb7e6d89103ae31196/vorugijudedekuvisefaza.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/0554d4311f42d4bb5d967283f2a17c05/64764781151.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b7461b35---jukagewubad.pdfIn PDF document text
    • http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/gasojagi.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/77514693666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ejemplos+de+oraciones+con+adverbios+en+ingles+y+espa%C3%B1olPDF 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_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 17904 bytes
SHA-256: c30be1b0a004dfc38d02a4710422e3d5810324a9d063523511df79b6f62ba5ac
font_01_sfnt_off00014208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14208 11396 bytes
SHA-256: d808f7106ac9762c084425f9b363166472e0241351c052562261766eb9c54510
font_02_sfnt_off00015c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1