Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d69e25cb548aa26…

MALICIOUS

PDF

123.2 KB Created: 2021-07-09 16:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 00f2c82116dd9eb6ed0470045ca82495 SHA-1: a0e07c106e932eddd0e1c57c9cdcb184f5fd82df SHA-256: 8d69e25cb548aa2666bc96187d1386c1ff60b605b7b08da1c9adfdce3986f87f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with PDF-based malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dailymaydemtien.com/userfiles/files/xikofonuzisafowamosata.pdf In PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/15800fe64978bcb5abec49f6d49d0b6b/48626384971.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160949052a859f---27345747775.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/11682448265.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/nidizobeg.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160789a14d1581---zadutugamatek.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/28361850974.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/nosufujum.pdfIn PDF document text
    • https://ever-progress.com/upload/files/zoluxobanupub.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca941261a5---19358875901.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/3aaebac1b6faee672d07d2bdcd9ccbc9/44152586861.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/22601781100.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/4376853936.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/digedosubomasorobaje.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///39596638776.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/95146806840.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/44905849899.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0nmcmab04r38fedae70pmj6ktn/kibewubutu.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ce5c1145ofi1s6bi51jok8c593/jufapubupawim.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dbe534e04c589873b8fa11666f4748b7/bijowazot.pdfIn PDF document text
    • http://area5srl.it/file/povemus.pdfIn PDF document text
    • https://edbcagliari.it/file/27791080315.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/xikutibijisafad.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/q1li8op9m418k635bp23sk19a9/kelavowifemusevo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af94c44e902---15089608310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+film+the+lion+king+2019+sub+indoPDF 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_off00017c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C22 18132 bytes
SHA-256: 79c80d06da2659e2d681c5f2188897d3b4c3aa0ac48ef468c1eb62fb96293bba
font_01_sfnt_off0001abb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABB7 11584 bytes
SHA-256: 1d6fccd29349f624ef710edaf63dabed75d1629c4758ec4ce5a6dc83a987e379
font_02_sfnt_off0001c6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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