Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f9bcde34739221…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 21:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5c67f9704ce6905f0a8d7749dc529f5e SHA-1: bcee4dd7fbb486779af5f4faabd0d883da198f12 SHA-256: e9f9bcde34739221f233200a21b01d6e1b73bf5a2a1d911ec1ef7dc17bcd3e0d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to distribute malware or phish for information. The embedded URLs, such as 'https://infrive.ru/uplcv?utm_term=downloader+app+for+android+tv+box', likely serve as lures to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 https://infrive.ru/uplcv?utm_term=downloader+app+for+android+tv+box PDF link annotation
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161413e9f46656---pajaniguvikewosijapov.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/numidafumojusexosipus.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/48676251007.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/bexixekamapato.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/59587788833.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/7391435966.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/kinivateripa.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/jiwuvonojagiri.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/76e4e0a0f8efc7fdb208653e8876c750/gidinimutufu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/dd63bf50a35913415b4ef8dd8d3adfec/86488788340.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/1244871125.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/15816482495.pdfIn PDF document text
    • https://duythanhsd.webthoidai.com/img-dn/files/dukibixumemenotapim.pdfIn PDF document text
    • https://kermanrooz.com/img/files/22933397463.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/910978874.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/mekam.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/latibezufinixitenu.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210920091750_nb9wo5.pdfIn PDF document text
    • https://tomaszbizon.pl/web/uploads/files/81352219710.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/78660693689.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/xogudog.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/11432998801.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/80759306968.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/83e0182ad161b42f8933086a92203ef2/ketasokukodalakowojus.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/53916913761.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/vasotoxiranoxirovoxamowol.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/towizijirokuvigabirijes.pdfIn PDF document text
    • 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_off0000b4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FC 10720 bytes
SHA-256: b11c2a5e4fdbcd20c773be57a56b527f73cd187b2fcca2a626e83deabd700d68
font_01_sfnt_off0000cd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 14612 bytes
SHA-256: d6b36308a83d433a6121c6839bacb16f8af40c9ab23709ccdd2280215bfda5e7

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