Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a225ceb9daa6d2b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-14 07:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 64a009138e0e7723a0fecf9422fb2abd SHA-1: 9faed8169b89bd89cbf3bffa5d75149df2d53cb3 SHA-256: 3a225ceb9daa6d2be7bb15d1ba2e5fe60fed03d293641d4ba51d71e1ea768b7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites that appear to be part of a link farm or hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data, limiting the analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/mesak.pdf In PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d05fa4825---26467508284.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/vibefuna.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/73124755942.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/beguwakosadesavizu.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137868a65ae2---79351016473.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e3ec40f3d---8752802645.pdfIn PDF document text
    • http://benly-carson.com/product/files/foludixiduxokopogumes.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378db23e1f3---73958317931.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/9dd5f0164ccc06b65fb4615299258c45/54667158567.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/9904863039.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/94529081591.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/42334050086.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/16876022940.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/zozikuradowisidu.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/6611160133.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/9254542438.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/bupapudosugikef.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/827499623.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/zotejirusexizirukomij.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/23648140888.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/51764765752.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cae444dcbc---vikad.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/23508222191.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/67265245129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=snooker+watch+online+freePDF 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_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 18028 bytes
SHA-256: 225a9cfecd8a41875fba97be04c7ea0b33312ee890089c3b708f39d3b8fc864d
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12339 10520 bytes
SHA-256: 992e903318377265bc087290c5def66ae031cbd72dd4bad3af276966d3f9a2ab