Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6743d95c2cf6663…

MALICIOUS

PDF

71.6 KB Created: 2021-09-22 22:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 388e8208351a18f11c95b059c881fb32 SHA-1: 551831cdc55e74962add6523d2e5809a3c3bcb83 SHA-256: f6743d95c2cf66637c2f1e208ce23a946988e709043381d5b6b3f4db8bad82a3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. It also functions as a link farm, hosting numerous PDF files on potentially disposable domains, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the execution of malicious actions or redirection to further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/eqm7jdb8faa07gogd7voq93h55/45329355821.pdf In PDF document text
    • http://kubabus.cz/novy-web/upload/file/78072949333.pdfIn PDF document text
    • http://web5gstore.com/Files/files/30428943876.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/94965569261.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/rupomi.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/53577935908.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/17932734534.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210916233033.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210919133358.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/kipopox.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/kemokonefuvavojivukawuwom.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/jodovudaj.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/6187634179.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/migizefixotirakomoxovo.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/37336444629.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///60749644275.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/wuxaragevenijadifowubedab.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/xujoma.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-5/20210905170522678453.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/15616877673.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/jawegonarasilufisabikevu.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9b450ad55d6cd17d55c6ae610e2bfced/pagejexovodit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=latest+cheap+android+mobile+phones+in+indiaPDF 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_off0000b60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 10876 bytes
SHA-256: b5c60ef8fcf2cd9233665556b4ba1d080a36e40232df7682c38ed876b1f6d8aa
font_02_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 16516 bytes
SHA-256: d5b6d09c9ecec03938f4ea77ece944d860ab8c8e4872f22c23a76285886cf06f

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