Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e714964665ff7e…

MALICIOUS

PDF

71.9 KB Created: 2021-09-13 10:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5cecf6c0d335fa71b1b4d9de789895e3 SHA-1: 52a4ab11f54f04e49831667a626a0105baa5feb5 SHA-256: f0e714964665ff7ebb3da173e4f380c9669cc76a575f264bd86f42eeeb57ec8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to suspicious domains, and is identified as a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a pattern of using disposable hosting for these links, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL analysis point to a malicious intent to redirect users to potentially harmful 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 http://www.evisiontiendaonline.com/ckfinder/userfiles/files/14044182475.pdf In PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/73978040467.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/noxusigunejavawijatol.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/408125166.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/72315311403.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/2109011316589884242yikm.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/babidojuzikujawim.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090307384557.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/jubivelotope.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/96353613345.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/nanumul.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/damagani.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/2601659935.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631209653.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/56364972471.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/modizewa.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/jorelixakudupen.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae2c941ee7---witiwijoguw.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/76576487554.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/bigogolujebudur.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/watejolop.pdfIn PDF document text
    • http://tencanpowder.com/d/files/ziwofozisixanowo.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/fewobosonutupizoso.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/tusoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=anime+download+site+for+androidPDF 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_off0000b917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 15820 bytes
SHA-256: 343fd3662687a0d581b31d76e3238897dd959b9507547e83f6ed4fb8da834faf
font_02_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 10584 bytes
SHA-256: 7cd64cc2c0542d3065c5ac96a92ab3ef09ccb038d5383d605e59f02ccc0d0989