Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7ed34718b5f3fa…

MALICIOUS

PDF

74.1 KB Created: 2021-09-28 01:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0c0da8b7728e213b2f98db7ead65cc48 SHA-1: 576314fc74213426adc7a31e8d1a3dfc3479b164 SHA-256: ba7ed34718b5f3fa31229ee8b948b36f3af05a47b85fc2b117371c41b62bf303
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with heuristics identifying it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://liepasmuiza.lv/userfiles/library/fuminetifudoxutu.pdf In PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/57236371624.pdfIn PDF document text
    • https://ikima.fr/uploads/file/tazimegutunazoferisav.pdfIn PDF document text
    • https://fundoohairstyles.com/hairstyler/images/file/71061847704.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/59419147553.pdfIn PDF document text
    • http://headrepublic.pl/images/files/golotukufusaku.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/9759840608.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/59482961292.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/39480657024.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/84588870616.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/geruxivazif.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/27471248638.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/xowekibo.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/87685679099.pdfIn PDF document text
    • https://zzhqhi.com/d/files/75526845072.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/53997557308.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/tibamimolatilotalaroj.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/45697647903.pdfIn PDF document text
    • https://shinaltd.ru/images/file/78471677682.pdfIn PDF document text
    • https://priscar.com/documents/files/91600156460.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/dizenifanomiruvojibos.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/49193905560.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/xozobusalevakewod.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a082e6f3ed47bdb0123c737e6d279136/86329533292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=el+alquimista+los+secretos+del+inmortal+nicolas+flamel+pdfPDF 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_off0000b50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50E 11008 bytes
SHA-256: 477608121051cc63d27347009bbf164089a07c937dc897fe9ee33fec87a2e229
font_01_sfnt_off0000ce62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE62 20204 bytes
SHA-256: 71b223cd8160a6567c8b54febc8477993ad2720f6626ef00130430fce698aa56
font_02_sfnt_off0001025d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1