Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7cb8534bd6ea52…

MALICIOUS

PDF

89.3 KB Created: 2021-09-01 17:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9282afaee0fcffabe9c742e21d14ba67 SHA-1: 45c7a771ad430606c1a764293823ab305b6aa8fa SHA-256: 9e7cb8534bd6ea52db8feb698379e70a0f1dfa24efc40106475c2f097c5cdc44
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The presence of a 'download button' lure further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/uplcv?utm_term=advanced+heat+transfer+lecture+notes+pdf PDF link annotation
    • https://eletmodguru.hu/files/files/sinup.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cfdf8f826---vudifiz.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/97821123018.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/97dcee6d00ab688d4ee2ab34ffc128ba/41964820037.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210628105150.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/ucebcea6r1qof880r448fe21rb/zusate.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/2101775925.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/27541962655.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/wejulopa.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/ravewexiwiguvifojedu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bks0kq57p3h9j8g81tn1doac21/65826209430.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/32651370916.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/14680603645.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/robasaxopidekizevales.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f54f3677ceb---xekevo.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/xejoza.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f426ce1f96---nosejokuparaka.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/rizuradalubopabikiv.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7ab12520a3762027e81cb1e91d6ffe2b/40270341708.pdfIn PDF document text
    • https://anfauglir.com/images/file/71045778865.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/batirifexokisedoputobegek.pdfIn PDF document text
    • https://tmtteks.com/files/17464594121.pdfIn PDF document text
    • http://stevis.cz/files/file/74575472218.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/60168948868.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_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 10772 bytes
SHA-256: a58a604a2e059ec6ff5e3c38c93353202a01605921510054aa985be1d9571dc3
font_02_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 19688 bytes
SHA-256: e544f814c8ff7888d8e8c5f9c1cdfe020f2e6ed166ccc449034542f39758ba15

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