Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bae09c733ef089a…

MALICIOUS

PDF

86.8 KB Created: 2021-09-11 23:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 16b3cad6352f3ef509e3712e5d6c2f87 SHA-1: 5e277f6ae238eeebce87d230106040e0c9a46e6c SHA-256: 6bae09c733ef089ad3f2d10dff5071a0b2d5301aa8dde63923731b276ae8d2bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with many pointing to unknown or potentially malicious domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, often involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130f6fe2b01e---muxumedewilepixozu.pdf In PDF document text
    • http://posicert.com/upload_fck/file/2021-9-2/20210902132239134797.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/87358023713.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/xugazi.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/16818149423.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/46471340047.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/34066568867.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/33873163168.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/151204421761328c52d457a.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/17186774876.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/musejiwiguwi.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/tibafejusuno.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/bazinefimedaluzewilirexu.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/nuboxefanebozideve.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/pisigumuvufu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/38438150016.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/regugirifoxujodirupoz.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/bojesapumomufunakisojasa.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/46310635566.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/9355709282.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/lezarodubirigozurawom.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/fuwotifebotivud.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/54083358866.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/tazix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=watch+demon+slayer+train+moviePDF 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_off0000ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 10808 bytes
SHA-256: 2b70d5ac67fec288d1ef7e6f9b4e1dbf36bb744226f71f8bd90a6750160c6c1f
font_01_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 18032 bytes
SHA-256: b35f9e18183cafd652aceb14c9d877a8cff0e49bc77d675baabf01a091b12604
font_02_sfnt_off00013522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1