Malicious PDF — malware analysis report

Static analysis result for SHA-256 648596a93a4364fc…

MALICIOUS

PDF

93.0 KB Created: 2021-08-07 01:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 64490ff31558ee2ab149e7f8fab69da6 SHA-1: e16020b1de4c310685db19113e56da42c0067e4f SHA-256: 648596a93a4364fc50fd5b52e6159a1fd1b57ed4f83d57c0b57c65b17d2b63e9
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 contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of external URIs and a link farm pattern indicates an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.fashiongale.ro/userfiles/files/70075156902.pdf In PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/0938e8301f89b3f841189688dc484b79/18291374997.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb385d79d1---4106151433.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d5b051817ad0f2951d373178811e6629/81772008488.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160911f45746c8---zugirudiwokawe.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/83715513216.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/39495931801.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/wiruminusasotefexetot.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/ee46967248424275d543df7c5f29b387/ruwiwelodakiruneju.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/xetanilirogaguz.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/33455298826.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f475e9bce25f047cc0eba2b199110c00/vatakipodusizo.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/2ac34383d562cdd4b5e372a38127319c/maranusomonali.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/89568354567.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ece462cf8ce---pimiwakuzejeziw.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/papodekewuvipodarenoduta.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8792e7d4e---jopuxusilorawava.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc5cf4bc4c---xarovodikalupop.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d0ace1039---ribifaxapapezogaban.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/8997545616.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/innico6m3i5rg30q5g9ll98d05/17254029821.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/vanopibud.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/1710f3b2dcac736a4cfbd06fe097a9a2/39541599810.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/tejojuderafakilixivebebum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=calcul+du+cout+de+production+tableau+excelPDF 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_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 19284 bytes
SHA-256: a43acc196cd79f0b93dd6829f372bc561b1e2a7561cde574f8901080b02d8d1a
font_01_sfnt_off00011c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 10712 bytes
SHA-256: d387cbbf763c19ea603a5175d1e06e576b103bd20dd7bf55c62872057d6e7579
font_02_sfnt_off000134cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CC 16424 bytes
SHA-256: 9ac2aa5edf3d9cb2ce5abf75bc01c90e81aa4054cbf3c6f40c347629da831d9b
font_03_sfnt_off00014b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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