Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1fd62325308269…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 09:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3d371f1a47f8ca35a2706c2ea04f704 SHA-1: 57a89ffd6fe8ae4979364e2bf837445e2841372c SHA-256: 0d1fd62325308269ab832f647b843e1aab0fb31a5c0c81b1159c3a4329148507
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the nature of PDF-based malicious content often involves embedded JavaScript for redirection or exploitation, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://njchemland.com/upload/files/86424174842.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161453973177be---27475173052.pdf
    • https://samuelben-horin.com/userfiles/file/kipopox.pdf
    • https://dehayemek.net/upload/ckfinder/files/pojagiz.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e014376f91---62676846246.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sopumipefomezen.pdf
    • https://ropaalmayoreo.com/images/userfiles/file/zofufuboveg.pdf
    • https://lochoanggia.com/upload/files/93328154429.pdf
    • https://alharithiforcameras.com/ckfinder/userfiles/files/91957937290.pdf
    • http://assotechne.eu/userfiles/files/nazulokapovijilokivoramo.pdf
    • http://watdoenwevandaag.nl/upload/lobotikuxokesagezipigus.pdf
    • https://bbpartner.cz/userfiles/file/10191610216.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/bvkhom7gp58opop09kghtm1v9l/dizosugalukotafakijap.pdf
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/kujuwokifalaguxotiletatuw.pdf
    • http://bscsaoner.in/ckfinder/userfiles/files/vagozadiruretigowut.pdf
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/92461222441.pdf
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48873271321.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/76657191301.pdf
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/73721261835.pdf
    • https://ladymamashop.com/uploads/files/202109041122555578.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0c1d55523---21611649470.pdf
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/rumujuli.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380fba7e88e---loxomosawosodifoxili.pdf
    • https://viettrungson.com/media/Files/62454361893.pdf
    • http://veganogle.es/uploads/ckfinder/files/82907170987.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=kny+live+wallpaper
    • 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_off0000ce45.bin
c4c4ea3988f5d1d06e37b6eb7b0b9e964a884ff34ece6b56d14df30c20448a7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE45 17936 bytes
font_01_sfnt_off0000fd73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 16792 bytes
font_02_sfnt_off0001158a.bin
fe7770f37238cf012dae53f79df26e07729528ac25458b93990d6650816988da
pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 10116 bytes