Malicious PDF — malware analysis report

Static analysis result for SHA-256 9950e47e47ce499d…

MALICIOUS

PDF

74.6 KB Created: 2021-09-27 07:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 43f477a4c5a453c5883bb880ac7cc9b8 SHA-1: 73cb6c79cd27ae4756c992fc1af80acbd8f7f70a SHA-256: 9950e47e47ce499da9e89f87dbd9fa6427962a952cd2b289597bb7d21ac4bb7d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous embedded URLs that point to other PDF files hosted on various domains. These URLs are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=csr2+racing+mod+apk PDF link annotation
    • http://asiavent.com/UserFiles/file///wesosez.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efbc219d42---mirawabibizukawopaxuf.pdfIn PDF document text
    • http://millecolori.it/images/file/3649757587.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/21965238826.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/36934714512.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139003b5a9a6---sokoxenuzorin.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/88918801712.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/acc1642bc54f79b39ae380a38b91242b/56252193982.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/96242303958.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/63164734536.pdfIn PDF document text
    • https://gadapavimenti.com/GadaFiles/file/53167845290.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/zotuzoliju.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/31379448313.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/regawalivodovizofur.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/zonajigavuzobaxosezi.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/venuziba.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/86767589860.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/mowove.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8nvf7e8esc3lu46au4tgobffe4/pobiweza.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/gupikuvewitomaxitudam.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/26948708750.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d3d0ab4c12---49988568842.pdfIn PDF document text
    • http://i-physiology.ru/upload/duxavufabe.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_off0000b90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90C 10824 bytes
SHA-256: f473480a47cd9d1191f2231c3afb7277190aab0c13ddebcf2c0b8f26a4adff60
font_01_sfnt_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 19840 bytes
SHA-256: 8c13b291ffd8ba632622c6059fb292bad3509e9df0b3fc5e4fe4af1fb82dcc8c

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