Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab06a2d759249b62…

MALICIOUS

PDF

82.1 KB Created: 2021-09-23 00:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03a4d4d2a352c6cf86c5b471eccbedad SHA-1: 9b482ec35b62b74e91cbb58d0c52e9c887188c94 SHA-256: ab06a2d759249b6210687f4c513c1b3079297534e85a3729d8c2abe3c677eaeb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, indicating a strong intent to redirect users to potentially malicious sites. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=auto+followers+ig+1000 PDF link annotation
    • https://nocnepal.org.np/ckfinder/userfiles/files/40514115773.pdfIn PDF document text
    • https://basisangka.com/contents/files/73733233433.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/bigofididun.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/21698311237.pdfIn PDF document text
    • http://specimport.by/files/files/83354043344.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8fd731521---vofedojuroleresuxigobos.pdfIn PDF document text
    • http://falerisztika.hu/tmp/7747470144.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/walumolejulovaxawige.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/zogodopoloxu.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/851830681613b880abc4a6.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/jineborarin.pdfIn PDF document text
    • http://logicamail.it/draft/media/jibudisa.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/26844780803.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/884966028613afdecc3604.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/tiwuwelijexuvepubipu.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/21666910346.pdfIn PDF document text
    • http://dsagco.com/Upload/file/jazazu.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/foruvaposak.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/46877544097.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/zukitetukomefuka.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5a70728dc1095c26c87c72f264132cae/4797738177.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/nutokixemozesufoluwadobag.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/37965648875.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/kasirakakepumejoxef.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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 10464 bytes
SHA-256: e8deb63481e75ab47d8ec5ba0897f44e44f6c7f72da972e8a8c8dddb601d6bcf
font_02_sfnt_off00010adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 18340 bytes
SHA-256: 1764055d66f1e63ec7a0a25ed7a633a73dc5b223f5607618e1596d8bbded025b

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