Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebfc926cf1bbe0e…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 04:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 11ded60b88d5f027d8334627f18ee27f SHA-1: 45cbeb944684d1391199d21896c961e87560765e SHA-256: aebfc926cf1bbe0e5ea25344de0a27907a59e777a19c4177cfd712f8f036c9e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, suggesting the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://coretry.ru/uplcv?utm_term=crazy+stupid+love+streaming+eng PDF link annotation
    • http://phuongdonggolf.vn/app/webroot/uploads/files/diwulapajolosof.pdfIn PDF document text
    • http://0228339500.kad.tw/kads/ckfinder/userfiles/files/bixogada.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/jesedifatibefu.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109040926075308.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f67d48317a0d29713eb9ec62d3dcdb07/liketixajamikodapuronixub.pdfIn PDF document text
    • http://ihdbd.org/upload/files/2331958229.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/buwajedajubasodojapalurud.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/dedude.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-7/20210907185939313019.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/9444967490.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/84144643842.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/ruxexijitubejujomomakite.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/49375498540.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/vukuviv.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee10478b76---mexigimebegu.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/femopa.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/63438395567.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/55088837025.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/fuxukuj.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/fuxenivon.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/56285511502.pdfIn PDF document text
    • 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_off0000bdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC3 16596 bytes
SHA-256: 2e3e56f34a1c2284c0b65178f721887e8078ae749a3292238bb1b859553bba41
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 11108 bytes
SHA-256: 503fc54d02c4e869e1b5bf31b37e1208a785865a6001231c1c568e208df7970b
font_02_sfnt_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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