Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89ff814b8f9a0a4…

MALICIOUS

PDF

87.6 KB Created: 2021-07-31 02:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f153c164a412c490e5acb155940ae673 SHA-1: 020fc4c56d749e2ae1c858d2059cdf987fe46763 SHA-256: f89ff814b8f9a0a475ecc022bc90d9322cccefcf38aa5b5ff96c07a37b81bee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple domains, some of which are hosted on compromised CMS platforms or disposable hosting. The presence of embedded URLs and the PDF structure suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cameralehiep.com/hinhanh_fckeditor/file/gisepetojezadodisava.pdf
    • http://alimentosldm.com/userfiles/file/pivejab.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b1c0854beba0c9e7c79705884e8bacdd/65596094489.pdf
    • http://worldcar.jp/userfiles/files/wewezubukudimilel.pdf
    • http://elmaryapi.com/ckfinder/userfiles/files/mawidebubisaxaxutexora.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8d1f5012f80ff156e42f9d3aaa4c4653/32298168883.pdf
    • http://hanhthien.net/uploads/file/pejurimemegerokabivawose.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e89185c1c---34346556545.pdf
    • http://gibeaufamily.com/clients/870383/File/19320499474.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d6ebbc9138870fef19d603a684b610ec/vesemirokofebupaxe.pdf
    • http://www.findvoters.com/userfiles/file/27926138639.pdf
    • https://pbchistoryonline.org/uploads/file/kivulukojadavuri.pdf
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/lilanisaj.pdf
    • http://candleelectricals.com/uploaded_files/userfiles/files/tolepaleda.pdf
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/16637792520.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/tofezejibujepenu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=narrador+equisciente+ejemplos+de+cuentos+cortos
    • 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_off0000ee5c.bin
8f211bf433d21e88d6979fcd406b7f1756ef07c57b9c2c55bc3ea26b9a188adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 18424 bytes
font_01_sfnt_off00011ce7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 16792 bytes
font_02_sfnt_off000134fe.bin
56af923e31ebc33fed92b7fcbaf20bffda52e33bdf0aac47bc3730f6fd8bbaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134FE 11028 bytes

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