Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9acac9df0bd4aa…

MALICIOUS

PDF

102.2 KB Created: 2021-06-28 16:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6e803acd088fee1ceb56614044070ef7 SHA-1: 2be638dd2911381436c79422723949c72260063b SHA-256: 8e9acac9df0bd4aadc94899a569e7aee683f6f0f47b1b97d99c72cc0fcc78c04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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 https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/85c3f8a5ddcaa7bc30f808515585d63a/64705708645.pdf In PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad002d17fc3---miledofelef.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ns95u9qs3noulsq6k8l5caq8mg/67166373876.pdfIn PDF document text
    • http://premium-t.info/files/files/18455017086.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/zonup.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/25843054316.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e98d801fa8---1799359047.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/dujifotogodoxaduxusufe.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/tasumumajurit.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ffa588bb---nejufowenawifikavatopapil.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160715fd4a8a4a---fegapoveguvuwinodos.pdfIn PDF document text
    • http://metallpress.ru/files/wogub.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9431f305f---fukeputebazumotir.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f921bf2376---97784793906.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/zexiwuv.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc65144b93---60507317075.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/datezik.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/21473b485b88012765aca5eb301faa73/vazifog.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2b10809d866f9eed617c021e3641ff96/rajezodiwapimegomubejoga.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071f18f88653---pulusevofirazileti.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cf540e35cdd2e77b23fad50adc5ebce0/36345201991.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b807cbaf7d---tozebuzuxu.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/63833446112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+sword+and+shield+soundtrack+downloadPDF 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_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 19860 bytes
SHA-256: ac91260e72be59fb5cb2e23d55c08fdb3104f5a75859a2b5e59dfd21e6be7876
font_02_sfnt_off00015c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C03 10912 bytes
SHA-256: 8a582457c27195f36c3f73c913dd3caf2e4bf62b2585426195baa531a982a5b2
font_03_sfnt_off00017525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17525 5496 bytes
SHA-256: ccdedf4284e994a5bbca3d6d9004c2482054409a589645f5e2d7fdfcb1bff67f

Open this report in the interactive analyzer, or submit your own file for analysis.