Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba15a6456492c17e…

MALICIOUS

PDF

77.8 KB Created: 2021-07-20 06:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c5a404bcef2edce83e9bd5d1748bcf52 SHA-1: 0f9daf9a6302a443220b2b799779210a1d4b39f2 SHA-256: ba15a6456492c17e4aeb062d9abecb7407b3fe7e4bbf70a025c50bb81257914e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a link farm for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 http://frutapac.es/ckfinder/userfiles/files/93578362085.pdf In PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b462aef5bd---vazuwawakifebi.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4a76df7e86bd4fb1aba08a7f06ff5f22/lavefegosefifaxekil.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/ririrekiwaber.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98ae969cf4---9590324622.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/f270bf444755dfc8fc1a2541e94d652d/noxabozomupaxup.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/wupofezimogimorokara.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adebb71b08b---vujupurusijefigabumada.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/jtv158a4hle6r0o3cf3j9p85ep/64815862308.pdfIn PDF document text
    • http://emaaravm.net/upload/files/20762664301.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/33b49f97106ac53d9436c03ec2374217/925117693.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2fd14589b775a873fc10d404f063dc5f/lebujunogavetidunipipawo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9810987b8a---zunefakoburopajuvaxone.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c09dc826e5b---nebivefeboz.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/19646913773.pdfIn PDF document text
    • http://bociany.sk/media/file/badizag.pdfIn PDF document text
    • https://inncredel.com/uploads/xejesifonevoner.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/49810945596.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-6/20210506154839315919.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073630fbae6e---rimaxiwe.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c10899d2cc79c423a6351992fc687ef6/jekisagaroka.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb5ac5090d---92399669493.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/jqla72r36mquedrf4vapthqv61/31021601826.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/pojamowotoleg.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/7vekk2n14v1ibsda5bqro1dbg1/fifepukofuwegabifupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=managerial+economics+mark+hirschey+solutionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39C 10976 bytes
SHA-256: 0e227dc56cad20780386b3eac40ea64b3770c22a5cabe6133ca806c2f5997e19
font_01_sfnt_off0000dce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE7 1896 bytes
SHA-256: febe4888f4320449c252a57cac97fb13f1478ba17986dc2373ded4bf28ed31f9
font_02_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 16924 bytes
SHA-256: 04afeafa2af8680a0c7c57547bf5d56796f96637d914b47899b6221cc273bf21
font_03_sfnt_off0001113a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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