Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72fdcac6c5cf97f…

MALICIOUS

PDF

81.0 KB Created: 2021-09-04 09:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8c5aaabc7c79230e918df08b4130a065 SHA-1: ae100e9bee80996edb95b14d8bad78435a925425 SHA-256: c72fdcac6c5cf97ffbfe2fa7a0d648084f88d528b275ee5e8898c8e1849a9a6b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of numerous unknown URLs reinforces the nature of this file as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bb0d092f01d72b32e8843e3578ce72e8/jemagoge.pdf In PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/tn7aajvo2c1h7s1jtv6chnvnj0/31188722432.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1623129847.pdfIn PDF document text
    • http://clingac.es/d/files/93720096107.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/19499255699.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/lokasedegakubiri.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/binup.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4c59407b40659ea74c5673358f51badb/95090592574.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/47392717451.pdfIn PDF document text
    • http://elai.kz/upload//2021/08files/210809233408042451te2r0.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3647f3dc---mudusumizonulug.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074055445873---57623763711.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e858950d3c---51653135489.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/20822615264.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/54989173386.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117e8b5b2aad---7082565153.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/d6i2ljs8ce1caku65nmbl0p324/64713787703.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/95933621747.pdfIn PDF document text
    • http://boldogelet.hu/media/xejarifufuxuxewodarejefe.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d60ec9c36e7---jejunavojufujim.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bc957e82a---61057405106.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/pofomofetexepewef.pdfIn PDF document text
    • https://kaisar168.com/contents//files/rikalebexazipolidatenigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=metodo+korsakoviano+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/tuxodevigomeliroj.pdfIn PDF document text
    • 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_off0000d799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 10596 bytes
SHA-256: 0d425866e79e9c04a1b6d714bf699763d7d8d663b39c75e0f51c5966cc4376f7
font_02_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 18128 bytes
SHA-256: 4d0d5b942ef5376bd6857ba1568fb53d4aaec36efc4b024f0a1af811f6b23d9f

Open this report in the interactive analyzer, or submit your own file for analysis.