Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8e800da95ed295…

MALICIOUS

PDF

88.2 KB Created: 2021-07-17 22:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fb9ab3143067bf43562612895c10cb22 SHA-1: f2ca1d33a8b6b65e72ba2b3898480ee29f951921 SHA-256: ae8e800da95ed2951b9678891bac4c255ec66866ef0d974cd2ba0ad82598442c
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dae1980735---23017454691.pdf In PDF document text
    • http://al-bandak.com/userfiles/file/dogugoge.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210703/file/16252631957557.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085082ce0375---62073165837.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/wuzavunudesu.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/zelibabuseg.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/emngto3fbfgisd56p54ggim9a1/42744910137.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/51102068659.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082cfa75bd0f---87882201927.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/purolusofipajuwaruxawe.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/31318552393.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/werul.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/fujama.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/gevebe.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a7e4cfd46---tuletaxufisetelozilolupo.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094abd17531c---valizekubobiginag.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/wixotitikolis.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/37880085951.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160760f68a4f92---85455374307.pdfIn PDF document text
    • http://roocenter.ru/upload/file/pewukabogojumibifudarexa.pdfIn PDF document text
    • https://adikkedua.com/contents//files/2298065109.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d77e7740a---38929853175.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/soronevaxejowejiwimukan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dutch+shepherd+lab+mix+puppies+for+salePDF 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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 17068 bytes
SHA-256: c72a5025456db7a3e73953bdaf36d9cecdbcc0141789867a95dba1050d1ad9b5
font_01_sfnt_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B7 11124 bytes
SHA-256: 00d84c95ee121d7d2c189acdbd4faf198b49980a928449b7fa2809fdc5b75592

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