Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec5518e6071721c…

MALICIOUS

PDF

252.1 KB Created: 2021-07-03 13:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e678c48ca3dad4b3a3127a26ea155cc5 SHA-1: bcd580758f82cd76d197eb4951d4ebc311d15784 SHA-256: eec5518e6071721c0106ad79f7e7713724da1a036e65e9fcf2bcd8cb9d409b81
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a compromised WordPress upload storage location, indicating a likely attempt to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the compromised host suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

Heuristics 5

  • 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.
  • 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://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/d42133a10c2d2283fcb782942f55e1bb/90374101754.pdf In PDF document text
    • http://www.thaiboat.net/image/upload/File/lolisezafavad.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7d165e4bc---ribapogagawizabavalesow.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/66167606428.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/suraxajenusem.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ed0d35e6b423a753aec8ae7800def9cb/dokez.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160878bab194c5---174461234.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d2f7693d7---18282718454.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/80887235026.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/pikoteririsejaw.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/64377107474.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/cd0f7b857d1fff55a02de0a68dbf5ac1/denojudikexej.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/varupudomujobixerifa.pdfIn PDF document text
    • http://mousike.it/img_ins/files/62783361605.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afd921da3f3---39680263367.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8a6a4d3d7---59552582466.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f6d373432---nakubu.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098b00b3b108---wipolaxakokojiditipum.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/xudowowoviwomoza.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcec4bdfc0---95136380369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+concept+of+physical+self+in+psychologyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003367b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3367B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00034e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E92 10736 bytes
SHA-256: 6365f41e9a42abe5f3b74d1618cac32e4d421e45d98f33dca1f90081328d3628
font_02_sfnt_off0003673d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3673D 24764 bytes
SHA-256: 421c73e1167159d4ab67932058d974e141ed3c6ca94e4ccbb9b939830bb18178
font_03_sfnt_off0003a278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A278 22500 bytes
SHA-256: 30faee52ccc0234810910578560de1ecd5678a6f2681f4b5a12f4dca09fc6178