Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0dc0ad34ad977d3…

MALICIOUS

PDF

78.3 KB Created: 2021-09-15 22:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0896767c687fd7211c1a47043912b524 SHA-1: 6edea3f23acb4b75bee0e255c0e5fe6508c46d06 SHA-256: e0dc0ad34ad977d3478c40c9c55142f70cbd567f8f5712aa95e63369566bf0d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, which are characteristic of link farms used to distribute malicious content or conduct phishing attacks. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/28694335753.pdf In PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/d17vr7j9grmp1javq69refit0r/24250931376.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/57961313767.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/mamodigepe.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/kejet.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/jafedewapadini.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/79371005775.pdfIn PDF document text
    • http://nuuts.mn/uploads/assets/buwunibofanuxurafezofetuz.pdfIn PDF document text
    • https://huanghecables.com/d/files/90425042225.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/95165022431.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/14271820917.pdfIn PDF document text
    • http://allasclub.com/campannas/file/47485593186.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/najivepawof.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/70221306187.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/vovitamilaw.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/zosinugadoxaku.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/65207112699.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/nixamufa.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/besiledunuvovilawemos.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/56551637709.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/59466079325.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9a744d51425f1c071ae90f904deb0668/36676356271.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/kovilabuli.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/vigejumisanet.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/jiwaluvepewezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=top+10+most+downloaded+mobile+games+in+the+worldPDF 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_off0000ca97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 11200 bytes
SHA-256: 99b9f778811b5cb516eccc8a372cf5024f456854823b142b5536b3dbef96636d
font_02_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 18020 bytes
SHA-256: a70d23b219ad8870e252ef0dfcf0552ab587a612d82ae89039dc25133d74b8d5

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