Malicious PDF — malware analysis report

Static analysis result for SHA-256 d372670c4a83be24…

MALICIOUS

PDF

84.2 KB Created: 2021-09-09 03:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c88867ce595e89684b66b8ff25064ac6 SHA-1: 556a66e24c4d47e747b5291357a282e132bf08e7 SHA-256: d372670c4a83be24ce9aa7c9ff9a75ce4da54ee1bcc61e9312bedc68916b9183
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or spamming operation. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/uplcv?utm_term=free+bachelor+stream PDF link annotation
    • https://camping-du-lac-dijon.com/userfiles/fichiers/77665458679.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/65263672199.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/gigenesefitapimimot.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/16999153954.pdfIn PDF document text
    • http://consade.com/userfiles/file/siwidufig.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/10773652897.pdfIn PDF document text
    • http://risme.vn/files/wofasotavufo.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/85924080637.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/xodunubojafiwis.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/86721572765.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/10319664386.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/65212303875.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/24849353160.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/lujivifazetelabixubib.pdfIn PDF document text
    • http://bresky.cz/res/file/43844537078.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161394d7ec5980---rixujif.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/28654495893.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/69552896389.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/xogubatot.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/lemusejujamujegonedizus.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/kepimejajek.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16131175879b27---4763246032.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202198159149774.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///54150183880.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/vopizonalejetale.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_off0000dff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF6 20200 bytes
SHA-256: 112b62851d352bb047eabfe0b68eeda3252d254138eec24461273c23b490832c
font_01_sfnt_off00011392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11392 10416 bytes
SHA-256: 2463a87e305d827760452b6d0872a18bdece1ec92c27978f82514558b5a7c0f2
font_02_sfnt_off00012b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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