Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2967d1c1fc5679…

MALICIOUS

PDF

78.0 KB Created: 2021-09-16 08:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fc427cd5e0f797908b91416591d4194e SHA-1: 12a84129142952583876a60e2e536279b56b478d SHA-256: ee2967d1c1fc567932a81ab011c0392237033dae1748d2bc88798a0c3f6d8d23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with many pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malware. Although no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://multimetrics.com/ckfinder/userfiles/files/timotazumow.pdf In PDF document text
    • http://trustarshida.co/cache/fck_files/file/retunibimupawofoxotiket.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/lesepikoxawev.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/72380440738.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/18865608121.pdfIn PDF document text
    • http://lex.tj/img/file/9286675988.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/fakulamovokoku.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/12687806081.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/37113090201.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/95832073422.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/zarakik.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/wiwuxozajegisiwodepom.pdfIn PDF document text
    • http://allasclub.com/campannas/file/8739435018.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/9958218977.pdfIn PDF document text
    • http://haokunchem.cn/upload/files/benudelixemexas.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138c2fdeddb2---51099944962.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/nebefuvesabiweris.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/laronudedudutuborip.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/13285756368.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/46313386204.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/wimilasezeliwotabevukurux.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/87154674298.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/29203727347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=rich+dad+poor+dad+pdf+arabicPDF 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_off0000c411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 21032 bytes
SHA-256: 9353edc28cc2e9ebfd84257bb0c159e00e88be366d7660fe5834ba349d5e732a
font_02_sfnt_off00011354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 10352 bytes
SHA-256: 86c175703d44efa62bde848c0d57a1ac5ec1b2bca968e743bb7b71d9da44fb00