Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3935fa89658af6…

MALICIOUS

PDF

80.5 KB Created: 2021-09-09 11:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 1c58d9a786f95bf5d29ce34eb8ef60f4 SHA-1: 5fb592ec45b40ac014e4b579985092951d7c6db6 SHA-256: be3935fa89658af60a49f32c43238b4a64923395e5f0eb72c36ce5e2ddbedcb5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ilonew.tasksplan.com/userfiles/files/57293127323.pdf In PDF document text
    • http://tokyoto.pl/UserFiles/file/zorojadamufajivabopu.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210901130553.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/44093172795.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/51061502631.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/85971396677.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/jojonabedamax.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/wadidevidozadixuwegis.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d0252126b---28699407249.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/48107324232.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/dutivotikesapakivuvesa.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/mobal.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/ligifeb.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109011514204160.pdfIn PDF document text
    • http://snkpost.com/fckedit_file/file///20210906_9_10_23.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/juvasudatobolegoposedudax.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/66602352011.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/30472915558.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/56254219884.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/64152864346.pdfIn PDF document text
    • https://ms01bet.net/contents/files/63273280622.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090606173529.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/repinu.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e503af57d---40008812275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=piano+tiles+3+apk+hackPDF 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_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 17388 bytes
SHA-256: 49168b5554e64dee54e7ed8eb003023967082d2f87934a929e26394ad527f1dd
font_02_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 10636 bytes
SHA-256: 9917c5a39ada52c284fcfd5fd3fca2825e831e1e6202464600ae59cad6fb94d6

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