Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d2d6a03d4d69bd…

MALICIOUS

PDF

91.7 KB Created: 2021-06-27 21:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9fa130ea0c1140828dfffbc0e255b8cd SHA-1: 4a22aea7bd29f12ab264f3ecbaae1e4c1429019b SHA-256: d6d2d6a03d4d69bdbcba142cef8d4914c7f898db6b1c78fe93f858bbb038fc25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further corroborate the malicious nature of the file, indicating it is likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe07697f89---surinibimapalokefiduwote.pdf In PDF document text
    • http://www.contectrade.hu/fckfiles/file/pupew.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/64893953769.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/95090158305.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/1vkv0l3cuu5i3vtv0e8ugtughg/gozafiwuvejif.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/66627463265.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/7c177ec4662a7fa647520a96ba4cf636/waseta.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/e8id9nodfuida38on5jpnt4u0i/fofodu.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/s7h2fhopmvpa2p4jl6reik9036/82876917922.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160914be9bdaaa---71123435225.pdfIn PDF document text
    • https://chptravel.ir/data/file/totode.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/31448181023.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/27716154093.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a6cd37e9a70574776c4efe8e40eac35/17190913840.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/deporilitejux.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/kixezevumevokure.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854407d9b05---77828605665.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087446936f31---93546540179.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094441c0f073---mupatakejekok.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fa49e138eb3e2ce94af137dd1b66f9fc/14394963037.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608138835b8a6---mapevima.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093da4b44fe9---55312737141.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8eac61e8ca---81519147150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=business+law+notes+for+bba+3rd+semPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2294d085f9---wefegoz.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_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 17760 bytes
SHA-256: 11d6a687622c6fc7649c180284f0a401bb83f0f17e6c1d9ba9bd6965d51734e6
font_01_sfnt_off00012dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E3 11064 bytes
SHA-256: 12efd62c2035a812b732383face3fd4182d3f1410ff010d05dbe0e624e92504b

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