Malicious PDF — malware analysis report

Static analysis result for SHA-256 629010b870847e2b…

MALICIOUS

PDF

79.7 KB Created: 2021-09-09 07:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9d761462393e74c25aa64936149c1a7 SHA-1: 90fcdffce0f26c5687d63e337b1f89b43abec230 SHA-256: 629010b870847e2b7bddbe3fa997290e9d6e8b2ae88e30e619c24c7638cb533f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://krisoc.ru/uplcv?utm_term=yts+official+bollywood PDF link annotation
    • http://pokewaveanaheim.com/uploads/files/76656547777.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/71399126818.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/28812369200.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/56733603091.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16138a38e04102---binelatuxeviviwuxiw.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/giguwad.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/3983789512.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/gosugunar.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/mebokukojigojinoxakisube.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/migusobi.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/vurajevowaverowunafalob.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/15408398990.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/cb8936eeca21749bfc45bd7aa7fcb403/47395244634.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/fojerunevun.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/xanosizokatefaki.pdfIn PDF document text
    • http://totoumi.jp/upload/file/3927295246.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/kudowujurinozujozi.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/1182049520.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/rudijaresuzix.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/dasef.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_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 17268 bytes
SHA-256: 360406e0b5a3020c94cfe68ea0cb5008c99fa40707bc3d1d52669ffb7234e873
font_01_sfnt_off00010183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 10456 bytes
SHA-256: 976ca12cb64431335080f0394295c16ae16fb2c28b483ac1275075f4a08b2dc4
font_02_sfnt_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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