Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c40e7502c4c6ec…

MALICIOUS

PDF

76.5 KB Created: 2021-09-20 07:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 09e59c764b56784c8254bca73ee22fd4 SHA-1: f7c37ad268a63ee12d5662a86ae368d720231f1a SHA-256: 07c40e7502c4c6ec8346c4b72039a36593c8f8043b23a75c5cdc2a524ece3bf8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged by ML and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or spam campaign. While no scripts were explicitly extracted, the nature of PDF exploits often involves JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=android+webview+print+pdf PDF link annotation
    • http://meble-tk.pl/userfiles/file/petasutodufewapuzi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5e34a804c---29950158600.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/vunugapinatamiw.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/96657095889.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/nokevezakaxinux.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/vefabuzonopites.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/nufapixagusadu.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/49794569595.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/45268602720.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sugepikopovi.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/matuwuwifidevigamibojim.pdfIn PDF document text
    • http://meditopthailand.com/file/22579795829.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/vidotu.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/xujuval.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/migokifovaderegoxuladeg.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/kubasi.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/veminizenajakatidow.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/48300256989.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/kupugapijomakabuje.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/85814161902.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/didugibesefapilejadagike.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/bifado.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/74896524688.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16146aa9da5b44---98879236673.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_off0000c63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63D 17728 bytes
SHA-256: 0af7aedf1ac10e33b3909ddacbd4d75477f34166e77a41ac0df9c3a13f397fd3
font_01_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 10388 bytes
SHA-256: f5a54ed171a8240173b83ff6865d84437dc29b7ddbd1d3e66ee0a686b054bc50
font_02_sfnt_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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