Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0010fcdaeb35188…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 16:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaed04abefc0da1f255e690b991c9e22 SHA-1: cfd22611f0614623d48341db1575e505fd53eb00 SHA-256: e0010fcdaeb35188b3d86ef3e6ea8ebc5c7a21f99b2ba79c7d269cd438ffffbb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content. Notably, the document instructs the user to disable security software, a common tactic in phishing or social engineering attacks to facilitate malware execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://captaincook.hu/userfiles/file/79065381109.pdf
    • https://apgr.eu/UserFiles/file/gisizapuwipezux.pdf
    • http://redeyeldn.com/userfiles/file/84783708130.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210918_CE77A70C2EC8B945.pdf
    • http://cableesmaltado.com/d/files/gukir.pdf
    • http://0851gay.org/userfiles/202109file/2021091417363370554.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161421771700cb---91713021064.pdf
    • http://woori-tour.kr/FileData/ckfinder/files/20210914_0937DBB9CF2B9190.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/66574024911.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/99561653743.pdf
    • http://naturalwonders.com/uploads/files/87969714604.pdf
    • http://dellalontra.it/userfiles/files/xabokotiralulogijotaj.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/vojir.pdf
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/zuvuwarabesuni.pdf
    • https://jagamimpi.info/contents/files/2576718944.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1489d53ab---jozatefiruwewo.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a93caa39e---dalajoxegizudokasefevov.pdf
    • http://thevisionkharj.com/userfiles/files/wezegumukiluri.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e692c3ab57246a2167e9cf68f1cb6011/84569178855.pdf
    • https://nilsahost.com/calisma2/files/uploads/59084821276.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/48110957121.pdf
    • http://wangyiphk.com/userfiles/vekexuluwedo.pdf
    • https://oferta.lt/i/File/31679923260.pdf
    • http://lavalnerina.it/userfiles/file/fopewibaboxafivejoxezu.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c971ed1926---31747154091.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=good+app+lock+for+android
    • 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_off0000db0c.bin
51c6a78e2eac793300e478b024a59b65e90b4486e0754815de3bafe4d08f81c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0C 17084 bytes
font_01_sfnt_off00010725.bin
86206cb8949cceaf20cc7df39659a9b511d656ec477ff8d530e976110ec43234
pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10348 bytes
font_02_sfnt_off00011e8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 16792 bytes