Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaeec1f863216a2…

MALICIOUS

PDF

83.0 KB Created: 2021-09-19 04:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5740efa32c995eda8398e207906fa0f3 SHA-1: 0f3b9b786cb8cb4dde7eec345d312a9c85f08f08 SHA-256: feaeec1f863216a2848a765acefe748a3b969afead3e2316abcabe675cdc1fa3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://stotex.rs/files/62591951613.pdf In PDF document text
    • https://epiphanych.com/images/file/romizixusu.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/18214583978.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/10058396188.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b0f9b0901---wulubelutuk.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/52655931461.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/jefupajafonakavemusag.pdfIn PDF document text
    • http://industra.sk/userfiles/file/13675868552.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/jezitifupodepelof.pdfIn PDF document text
    • http://cellfruits.com/ckfinder/userfiles/files/nenikomavapowovilokorupo.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/nidetiduzirizexidodibuju.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/fokabubiluxetutexifegig.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/53036078258.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/2878770193.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/lixonirisinusejoto.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/pejowomuki.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/jisev.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/wewewifi.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/wepelituvirodijorosuw.pdfIn PDF document text
    • http://vlajamo.cz/images/file/wevixukanig.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/19629662942.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/tawaren.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/wojalevavixemabenisuraf.pdfIn PDF document text
    • http://gekon.net/userfiles/file/54670367461.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/32642321397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+red+color+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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 17924 bytes
SHA-256: 2d9f20230911d0ceb0ea6cb82e2e59c84d83674d40cccfd186e8c6b87f62ba3d
font_01_sfnt_off00010ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E9 10372 bytes
SHA-256: 8397b043b2f70928d26321d8dac0b21341ae56eafe7111fc8804d2c7d7d385bc

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