Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9f056a5298a922…

MALICIOUS

PDF

72.3 KB Created: 2021-09-30 18:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dfe84063f30215fa1eed0b9d68f13961 SHA-1: 9d1e4256cd659bbc55d87a307023f30c47d4c063 SHA-256: fb9f056a5298a9229fda3afc4249efa0a28fa4ef5e20499f50683273300f1bbf
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 embedded URLs, including one that appears to be a redirector for movie search terms, suggesting a phishing or malware distribution lure. The PDF structure and embedded content indicate it's designed to trick users into visiting potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=watch+spider+man+homecoming+online+free+putlocker PDF link annotation
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138a8fa7c1e2---49028293504.pdfIn PDF document text
    • http://eternoohydro.com/d/files/jurisabazejazojomisotab.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/9853337304.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/24357769230.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/85153119365.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/tolizo.pdfIn PDF document text
    • http://hexindechem.com/upload/files/nilug.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/tafunililizabekosipe.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c97e30ffe9---meperinirizalirilo.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/15810555242.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/16136726358.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/wexenuxulodabiwilaxafusa.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/zebasaf.pdfIn PDF document text
    • http://laserinnsbruck.com/static/54284501717.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/zorasusexozujovatadufo.pdfIn PDF document text
    • https://atrax.hr/files/gefixizaroponepilolotiki.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/zezeveso.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/nipozifaperanopenubazig.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/28464333979.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/wabubizudizedelel.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210909_10469A515AF80D74.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/85418391945.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/61701775184.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/72279619151.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_off0000b40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB40E 16700 bytes
SHA-256: 45afbb83a8174a0111708c15e29053d77d4c1a1f1cc0ec75f5b98601fc192b23
font_01_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 11252 bytes
SHA-256: 6cabac38e12d86d1874fcbd41c0f79b2c2dd764bbba86552219113588d47ba9e

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