Malicious PDF — malware analysis report

Static analysis result for SHA-256 602a9ff096b3dded…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 02:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d8f4185b17d3e02315691107a2dbfab8 SHA-1: 41a612488d8ed422a4f491e80a12b33d47f9ea79 SHA-256: 602a9ff096b3dded1fd77adc23c1e85a01d3604a5601ecf2fd6ee59900aa3b96
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm, with many hosted on disposable domains, indicating a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically highlights the nature of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6382

Heuristics 4

  • 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
  • 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 http://ever-pioneer.com/upload/files/52719083306.pdf In PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/12854704110.pdfIn PDF document text
    • http://xsteelstock.com/d/files/fezugi.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/85420480646.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///fakodudaluwadupuju.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/82502559597.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/sugozuj.pdfIn PDF document text
    • https://naves.cz/res/file/49142658287.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/kuzijewisupezawade.pdfIn PDF document text
    • https://majubesar.info/contents/files/jazevex.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/xadogipexigesuzasazojedo.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16130acde31fb2---72878383846.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/98812002841.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/bigunapafirilu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa7a889ed2---48662730932.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/barezemaroxoda.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/nigevogumegoguxefijawulix.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/bomipamamol.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/30172641690.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/30616559958.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/bigokosasuzenabubuwudeva.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/90618891105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=all+fortnite+season+battle+pass+skinsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 10564 bytes
SHA-256: b86b2d0a20eaa3951712c14242e38d156b24a2560c9411d2970d6b29e1288745
font_01_sfnt_off00012afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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