Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1db1216cee0a9e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-14 13:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ee1ca7351b5bc84b0b5789ce4d0cf8d SHA-1: 74e87042a7d69135931960e1cb12c648fae84406 SHA-256: 0f1db1216cee0a9e6d4c729c784eca29916387a7dfa644416b8eb3663476c988
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external files, with a high concentration on disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://phuketwebstudio.com/ckfinder/userfiles/files/46241766619.pdf In PDF document text
    • http://about-dogs.ru/upload/file/81917477439.pdfIn PDF document text
    • https://codecs.ro/images/file/xuxijoduxemetejogujamow.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/tarapuzatirosagezaf.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a288fb28c3---4706200983.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/68219907769.pdfIn PDF document text
    • http://hanifeugur.com/image/files/25183955304.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/18227752965.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/46649380625.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/77635822927.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/jasip.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/mukopikidunasevo.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/dobunoragizalejetolibulax.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/27103219941.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/sufiteridafefewo.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/6912903572.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/gupesadul.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/49087198249.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/q71hddlblru6s0ec4elj28sog7/55565592958.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/vumadivibakewubu.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/25813139389.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/52240636459.pdfIn PDF document text
    • http://santeh.md/img/files/lazaraba.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/66465495577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=vpn+360+download+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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 18140 bytes
SHA-256: bac196bb242da597432e0d25849f34c7e6936291b716777564dbbc1815d22b36
font_01_sfnt_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 10504 bytes
SHA-256: c7b3c587d8ac53b03238acd06073e48782cf474810a06043c021729aa837510f
font_02_sfnt_off00011dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1