Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70eeea8b527399f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 18:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92be85c5b5e9b45ecc86d7a6ee8cf344 SHA-1: 3114ab09a9fb384e88d3cf72dc11e836502d6fd9 SHA-256: e70eeea8b527399fcbb80d3369ce08ffafea65987b25d8bd89238e0722064f48
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are structured as link farms on disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=supprimer+les+pub+sur+application+android PDF link annotation
    • http://standdominica.org/files/files/sutepavanudagomagex.pdfIn PDF document text
    • https://vpmemorial.net/images/file/debogijegew.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/68051623460.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/kezixiwasejete.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/zikenameromufolijofos.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dusesufurufiwod.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-15/20210915233334907685.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/42612801972.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/87640113162.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/23908523720.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/61684713582.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/46991073292.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/rososejag.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/nixabibolak.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/movirofujugugiko.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/koruranaraza.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/35326681802.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/kudonewefemugo.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/66440713076.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/62164484648.pdfIn PDF document text
    • http://dgone.kr/userfiles/file/20210919120414.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/duwilexawajomo.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109140921316721.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210909064227_591208015.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_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 18932 bytes
SHA-256: 84755f858bf8661fe41829dbf92545dc6d14080b1a41ad4de3969d4499c6f586
font_02_sfnt_off00011960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11960 10992 bytes
SHA-256: a48feab3d228b1d701d7666bf66d3dd637e0422292129ea3f39e23f8c5897900

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