Malicious PDF — malware analysis report

Static analysis result for SHA-256 3390566f3992f310…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 22:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 270126a33f1982241e75d7c97314f63b SHA-1: 9da46ab69467fdeb286ea535afa7f1432954a78d SHA-256: 3390566f3992f3109fc7076d9ae6da7b2ebdca21377ba02049fe6a5395604a6e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it contains numerous links to potentially disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/fepudibosanu.pdf In PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/35241604961.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/lixuwava.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/pimedosipurov.pdfIn PDF document text
    • http://aminotp.com/upload/files/28655165670.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/10336176490.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/76883396676.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/48702998958.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613551ec7e6a8---xukijobepamoletirotejomax.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/fiwuzepigev.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/lanerugamaguvofigav.pdfIn PDF document text
    • http://spiregene.com/image/files/20210903_054416.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/58913790822.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/82678196176.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/25494138028.pdfIn PDF document text
    • http://sjhtractor.com/d/files/92520899078.pdfIn PDF document text
    • https://aokman-drive.com/d/files/muzero.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/19229221254.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/texinosu.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/2318252511.pdfIn PDF document text
    • https://tl-systems.hu/files/files/liwuveb.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/66350436254.pdfIn PDF document text
    • http://halanmilk.com/upload/files/88392930592.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/12930187001.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/kogidujapajuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=vidmate+apk+low+versionPDF 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_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 10768 bytes
SHA-256: c83174dcdab03beac4f6bc3706c0ecdb1086989d3db740dadb98e32ea8e52519
font_01_sfnt_off0000f622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF622 17500 bytes
SHA-256: 967bec359ddf4fc2db449f7bd2b815f07edf3b9ee1174c180b099a65c4069734
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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