Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e05949ba86a898c…

MALICIOUS

PDF

80.8 KB Created: 2021-09-20 12:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d6a8a2bf00a2564eda610e617ba614e4 SHA-1: f4eab952626de1c70aaf4ae130008b34c0e32b29 SHA-256: 1e05949ba86a898c293373f4b3649caa54e26068f7e83f0556cef613c4f26228
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, indicating an attempt to redirect users to malicious sites. No scripts were extracted, but the presence of numerous suspicious URLs suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ba23b1c33563fd9dc8800620d07e4f11/jugugudelitimog.pdf In PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/wegixipugaxefofa.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/32603858707.pdfIn PDF document text
    • https://kaparatt.com/images/File/6368125133.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/zabuxikufilizetedijafajex.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/sutekolebezotap.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/12899956701.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e259bfe8c---sefader.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/81683356929.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/jiwezugokovimefukav.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/1796458081.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613db4c9705d6---zodiridokasonulizukakadu.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xudawunudanuwukiwotavajas.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/womuxinarulifa.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210905232136.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb35aea89a---26051776073.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/55750805284.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/lavezijolomu.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/50149568658.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/49908904774.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/bozaxinugaposorazujugije.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f1cd7d1cd---34447109918.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/76861095655.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mirror+addon+mcpePDF 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_off0000d876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD876 17712 bytes
SHA-256: b97c69aa19d4c98e7ae7da746491bbc83b0527cd0d7dcfb5442f574c20cec490
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10356 bytes
SHA-256: ce92ff252f3067eb9a52a43e7b254f1659d8af56b214c27bd6bca6d2133451b5