Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e8d6d3c80304ec…

MALICIOUS

PDF

92.9 KB Created: 2021-09-07 00:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a56a0fc1452febe5df53ab661fdb83ea SHA-1: f513de4fe0a3b626237a53de07cbc7ea4141d0bf SHA-256: 75e8d6d3c80304ec92881c647bd6b6550c2073f4b845776b8db6742ebd3505ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://residenciasanamaro.es/userfiles/files/13842195099.pdf In PDF document text
    • http://abnicum.com/files/file/womefepifepaxewizago.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/1eb441380759483b21861f5a359e263f/risadulatibamedojig.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705023eecac---mufiremoxukepezupapu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7f6888d5---71076647808.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c4ac1857e---5309894015.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/34944932820.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678ab9ef2c---55923719814.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b348df3b73765e58f103c4d965516abf/26341334293.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/kisigawobesevove.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/gotim.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/82569318150.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/db9b516db2a4b6899388a9f436532191/tomis.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/13178443933.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/tezufujezivov.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7cef3013---kegekonafigina.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/14088574247.pdfIn PDF document text
    • https://panama4d.com/contents//files/17489011665.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/gajuwaxakirivetosit.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b35594237e7---35691976297.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110e0785b079---suzasedasovorubasokudabom.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/wawobitatarusawetisagogu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3af7d7c1---fokas.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/nebobozatumuwesifor.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/nujedajikafelasizofenol.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/2t30bs0ah4f9er7l3butbk7vs6/37688742173.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ca2ad4ea---koxolelimig.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3604328793---kubozejavefivomudugejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=louvores+avulsos+icm+pdfPDF 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_off00010118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001192f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192F 10700 bytes
SHA-256: 4c57db6886c9cd3d6b1979e9b0af253fa4ae46c9bf804c9bd4a0e1f8bd76479e
font_02_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 19324 bytes
SHA-256: b10d4f6c83dfe5a1d1beb0d468d845b3ba32b58acef3bc0da4465eef8d23d6d4

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