Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcb00e169625d65…

MALICIOUS

PDF

76.3 KB Created: 2021-09-22 23:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ee9668e6c718de50cc03562edd4adba SHA-1: e49436aac7d6f3fac64eb7e98cbfd89c146e55f9 SHA-256: 0dcb00e169625d65ed8ff4f151bdc9888f546aa296f92e6b95e50a93d0678077
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 external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=dream+league+soccer+mod+unlimited+player+development PDF link annotation
    • https://responsible-tourism-alliance.com/content_file/files/fubukoz.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/26795929798.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/46690861626.pdfIn PDF document text
    • http://preprod-proximeo.com/ckfinder/userfiles/files/madujegujigop.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/gijaligoxebeza.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/kezur.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/lubepibazajape.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/bavimofafupipowakupa.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/56734894455.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/75638181203.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/kokozedewux.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/sqdpn41em3o4lgd4pg9og1pbp0/lelitozoma.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/riwigalepizimidiw.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/34628888630.pdfIn PDF document text
    • https://avenue102.com/uploads/file/61290744250.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/vigolaribirufajozulelo.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/36953150876.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/74060611305.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/nasojameza.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/magunakipi.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/fugidivutu.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/87200046429.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/94409668734.pdfIn PDF document text
    • https://atavio.ru/files/file/vamepugupawo.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/57972302139.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_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 16088 bytes
SHA-256: 0857b47747fb7f5822efadb044c2949b76ce1de418830825d57ce757367bfaa5
font_01_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 11140 bytes
SHA-256: 9ce797c8e3c57bda1ae22069edf5992e75bbf2a969b1dd9c078a2a9b3055bcc3