Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bf560611653736…

MALICIOUS

PDF

81.8 KB Created: 2021-09-10 12:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92a08331a4a89c710cce35f4b7be112e SHA-1: 8f091bc7d2c3e7d5950afe92e17e3ebc6db13e7b SHA-256: 10bf5606116537366de91f8d04bc14c071d060a66983a0097587b1fa181a4fde
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many pointing to disposable domains, designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within a seemingly legitimate document, likely to trick users into downloading malware or visiting phishing sites.

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://network-italia.it/file/48493148408.pdf In PDF document text
    • https://ismart99.net/upload/files/68259999459.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abf9a48a3f---14066491622.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/94533797354.pdfIn PDF document text
    • http://araonline.hu/uploads/file/69164439007.pdfIn PDF document text
    • https://kuepancong.com/contents/files/medesuf.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/83693521400.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/wubuzowewiridirolugus.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/97290081179.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/powisinivuvozavafimitu.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/manizomumofakirurose.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/womazubadubuterasesonerox.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/voduretemajesejozosu.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/25164513914.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/xixinepi.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/37276868587.pdfIn PDF document text
    • http://446888.top/userfiles/file/14230062001.pdfIn PDF document text
    • http://djapm.com/userfiles/file/65955445485.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/birofavus.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161382b643bbfd---82874441747.pdfIn PDF document text
    • https://rippa.pt/files/file/10948662521.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/josuputinasosajuno.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/95263035939.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/39869702848.pdfIn PDF document text
    • http://dhf-china.com/d/files/87361044814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pokemon+xd+gale+of+darkness+download+for+androidPDF 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_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 17988 bytes
SHA-256: 39a49306c9784f2af54f6a226f92acdc5251277fdedd1cbb0bbff40d95590e2c
font_02_sfnt_off00011ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF9 10880 bytes
SHA-256: 7e4218b8392ecd14598efe1e43c6bb67c6fae0bf85b37f864c715d5882da9055

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