Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d405cdb5db1f3f…

MALICIOUS

PDF

72.9 KB Created: 2021-09-13 05:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 255f6a14b9b2d5877dab713965712df4 SHA-1: 76a5898287502cff6cf3399cd4a917cde663af38 SHA-256: e0d405cdb5db1f3fd2730d8f5899dc775ad5cfc45b4c8956fe3a908ab453184d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious payloads. The PDF also functions as a link farm, directing users to various URLs that host further PDF files, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ontogepszerviz.hu/editor_up/lusokanususe.pdf In PDF document text
    • http://gr-chem.com/upload/files/70150730730.pdfIn PDF document text
    • http://cutskytools.com/d/files/puret.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/384092b26b8a905e6d818f2daca32bd9/7743256030.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f2fab5c4---mokifizik.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/livubogedeb.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/panidif.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/ligikerowuxal.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/59370459216.pdfIn PDF document text
    • https://aashianarealty.com/file/58730477827.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/nuxuwozitapugarun.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/dimavusisif.pdfIn PDF document text
    • https://mfdesign.hu/files/file/viserobiruna.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/12613890519.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/41532688153.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/taduv.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/26542328914.pdfIn PDF document text
    • https://phm.vn/upload/files/nipowebiwujefisa.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/35257309065.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/3457779679.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/bukozutatemikemaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=infinity+phone+unlocker+apkPDF 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_off0000ba38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24A 16908 bytes
SHA-256: 154c28a09ad0742f69d7b2f1d0093b5e62a7bb61b7110bba8f5b6fbe3c050ab4
font_02_sfnt_off0000fe3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 10668 bytes
SHA-256: 921358c4391f1846ef277777d177d4d6be752a15d1988d253de64168e4731b78

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