Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c1d4d76ea4cd45…

MALICIOUS

PDF

82.6 KB Created: 2021-09-11 01:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44101c496f44075011193177103aada9 SHA-1: 06fd7c99893de9a161e74128acd02c19855cc52d SHA-256: e9c1d4d76ea4cd4597ceeb7803b8043b845757e4492e7521f3aaebcb474a2ccf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, some of which are identified as compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://446888.top/userfiles/file/vowuzotolavodeximol.pdf In PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/12778786413.pdfIn PDF document text
    • http://393citizen.com/upload/files/82553241495.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/81530791249.pdfIn PDF document text
    • http://innotack.com/userfiles/files/xutomilekikugewilavawi.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/furipefakijewidugeju.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/67164575069.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/16931325805.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/kafemiki.pdfIn PDF document text
    • http://beiks.info/public/file/zojiwifumiferibexoni.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/82971311286.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b695e7d98---43113795951.pdfIn PDF document text
    • http://hkwwta.org/userfiles/potizifubijilo.pdfIn PDF document text
    • https://dptech.vn/uploads/files/2013868765.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/surexawudirukonumasov.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/15769576746133e4623a9a6.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/90748474251.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/fimuvoxuvinosuzumaweli.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613780b3af985---90089549498.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a2ea43c1be004f7bfeaf4b5f5521c5e2/wokefosaxodog.pdfIn PDF document text
    • https://austarpharma.com/upload/files/bogunowudikefumorule.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15265261552.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d66b42f13---takujegulovukiva.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d28ed8a977de9bb5c9c19aa4d06071a9/83191112292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=organic+name+reactions+pdf+class+12PDF 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 17692 bytes
SHA-256: 7215423d5a7778d8b99342285b1685a4dca6d5a1190960919e4953145ac1bfbc
font_01_sfnt_off00010a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 11160 bytes
SHA-256: 1f7ea3f3f59a3b701042f43aae6c926b26db59037623027ba9b05a9d0e8ffc9d
font_02_sfnt_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.