Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee9d45e5ac6d477…

MALICIOUS

PDF

83.5 KB Created: 2021-09-23 20:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7fd89292f14c4f230e8c3cd1ae6752f SHA-1: fcc32850b2d975db0fe25950303b8cb797268f81 SHA-256: eee9d45e5ac6d4779672100c00a37c8bc5ad849744c153fb55dacb1e58d48616
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to disposable hosting and are structured as a link farm, suggesting a phishing or malware distribution attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=dream+league+2017+obb+file+download PDF link annotation
    • http://hide-bo.com/img/tmp/file/xukikulemuzafojojomulude.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/82645324790.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/83891587221.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/5361075249.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219152255474148.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/6496317890.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/87223786716.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132995a5c558---rixozesipuwotageb.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/jevedogijo.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/dovobate.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/bugelos.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/72192125369.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/44654242723.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/rubaguxawirelade.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/68754060937.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/65163907370.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/dazojejiruwup.pdfIn PDF document text
    • http://signauction.net/userfiles/file/xutozazuf.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/64846244022.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/1411512820.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/99112154638.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/9314471924.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/kepejovotenaregape.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/kazasamuxalabu.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/12041116663.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_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 18424 bytes
SHA-256: 61501021836a8452238a12efcdbd896c5b68cabecde09421d0e9a4c69129189e
font_01_sfnt_off00010e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12648 11100 bytes
SHA-256: aa9a0f26506b3292fd7921b97732c049f350a2b5a4ba29bc13074116ecc1e680