Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9ba2b95a9ddc82…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 01:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 74fb1af59261461bb4383d5bdf1bb092 SHA-1: edacc053fe8381254d287cff508054e1f9ef9138 SHA-256: ee9ba2b95a9ddc826ed10be73a725466739c9b14792b9203e03965b4adf2ea76
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated, but the presence of numerous external URIs indicates an attempt to redirect the user to malicious content.

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://huntic.ru/uplcv?utm_term=give+any+two+examples+of+operating+system PDF link annotation
    • http://omonetach.pl/foto/ilustracje/file/30849019444.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-18/20210918075901675153.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/51622359038.pdfIn PDF document text
    • http://bostoncake888.com/UserFiles/files/dexupifiwokobewuxiketunav.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f293b6d54---12454972593.pdfIn PDF document text
    • http://xaydunganphubacninh.com/webroot/img/files/zulezogepikum.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/31584157260.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/2520919533.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/61269982315.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/13925308004.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/vidifis.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/61438957656.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/kofuredevuvikumesasa.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/kokodalizatafewojuzu.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/70252930218.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210918142943304.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/xoruwivakelumopeni.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/kopuzesowakexaferadevona.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/44189960489.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/6177436083650052375ca7da4b1e8e27/mirizuda.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woviguweliresaletufojew.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/jesekokitoret.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/puzomuruz.pdfIn PDF document text
    • http://acelybio.com/upload/files/22581895105.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/torotazixuxoponuvepa.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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 18696 bytes
SHA-256: e4104660f9e10548b47e8be43f364ad853e8f96b8f4c3cdd9fd31bf30de94dcb
font_02_sfnt_off00012714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 11108 bytes
SHA-256: 37a8296a0a673c388452939c682f09c46eea264d5a1c995cf9cc49c727c0ff74