Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb30e4c276086a23…

MALICIOUS

PDF

76.3 KB Created: 2021-09-01 07:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6507a6432bf9644c55fa13a01f7aedac SHA-1: 51071686ec205b01831c6bff53394ea790a9da75 SHA-256: eb30e4c276086a239e9e8f6982651a5504e0462a924b0c6751b0fa5e423f3a01
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. It contains numerous links to compromised WordPress uploads and disposable hosting, suggesting an attempt to host malicious content or redirect users. The document body, though heavily obfuscated, contains embedded URLs and structural elements indicative of a callback phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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 https://momsgardenfoods.com/ckfinder/userfiles/files/61377788414.pdf In PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b450358a30---bigadi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084162b5937a---21576453860.pdfIn PDF document text
    • http://humanlitech.com/files/files/70137692693.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/46929876821.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771953750b2---zipamomabiwemalujunotewa.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/bmt8sauhae5p7ni1ub1knlkc51/sumixuwananemilaloliwi.pdfIn PDF document text
    • http://hidramaco.com/files/files/wisabunidavekujubo.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffc9a5d190---zupakururol.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba1bc0f6cde020cac8b14b0c065eb991/fosinuzig.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/44415081669.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/wozidunopaderuku.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/8797551154.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc7a111bb09---95589395307.pdfIn PDF document text
    • https://avenue102.com/uploads/file/dejivosiwarufexoninavo.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/keponodusefuxe.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/valuvoger.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/rogel.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8ba115613847cb5fcfa9bfbac5b200a/lotogewatugaxizum.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080aeec3b778---39848253079.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/dofabazazap.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c96a438f747---nopixulur.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/nodiwejeruzakopuguxipok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=subscribe+out+of+rangePDF 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_off0000c4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 17436 bytes
SHA-256: 3e9828fc879a169004a11af232cd3fda51e7968e433b2c77ec100d5bf7292f04
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 10780 bytes
SHA-256: 308433bb5fe1ae954a8a3c17946046d8b4db9398881987e9386f03658c1d11ac