Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fccc492a696197…

MALICIOUS

PDF

74.9 KB Created: 2021-10-08 03:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 45b6363da6127c123d37a8191ceb8e02 SHA-1: 570359dd29bd34698c1c4078d00a092f856a5b79 SHA-256: 07fccc492a696197cc63029b7fa03c0d825c818ae030866813c58101737f7974
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, with one heuristic specifically identifying it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://myphammonly.com/luutru/files/binulimi.pdf In PDF document text
    • http://naturestuff.nl/siteimages/file/1208027783.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/tqc56ns9drk1238omsnd95d324/ganexoruxugimu.pdfIn PDF document text
    • http://khonggianxua.samdigroup.vn/app/webroot/upload/files/rumamewubatosowunuf.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/15527936302.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/52318570621.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1613782654b48f---8031275318.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/74806076118.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/25502408063.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/96129287382.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/xilopepujujaxevafukevus.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/xexorakazaziviwisox.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/fegurujilurirotide.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/25176865766.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/61747741998.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/wiselunudijud.pdfIn PDF document text
    • http://slsnn.ru/content/files/36194854769.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/3127372725.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109192307086043.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///33643524817.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/7455748508.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/lezaxabuwazejiwegojox.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/xomojanuruna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=xml+quiz+questions+and+answersPDF 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_off0000c28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 10808 bytes
SHA-256: c0c8ee612a8d654b34718f391a9a4ed65849ac2919121dd840b52dcbcf2c172d
font_02_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 16428 bytes
SHA-256: 6f338942de06057086eb4eb6de092bc8ff135409f2ef1f53d81a9703f02d0cf4