Malicious PDF — malware analysis report

Static analysis result for SHA-256 6994b2982f39df74…

MALICIOUS

PDF

90.8 KB Created: 2021-09-01 00:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0bf9ff2702b2b620586c69a939878eb4 SHA-1: 6a817d5471f8cb1b7e4c005f2fa5ce16b9ae5f1e SHA-256: 6994b2982f39df74b995c2efdedd41f536d581b257882df2e89e9734c82620d9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF_URI heuristics and the compromised CMS upload link farm point towards a coordinated effort to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=cpc+model+question+paper+with+answers+pdf PDF link annotation
    • http://humanlitech.com/files/files/waxijexa.pdfIn PDF document text
    • https://go2germany.ru/files/file/zowivoteberi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/61124878756.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/60644203972.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad9294a86---vesusiju.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/99986729770.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/84394314.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/wibova.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5a885998---35252150671.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/52813d2008bcb30c1c7cf1aacb3e2152/genemuwugonazudokamozurud.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/zuval.pdfPDF link annotation
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cabe5a1b208---rubesutepiviwonil.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/7h0268ivbvqc0mrgs3u2qsma3r/87571590045.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b38c60a904---8942082880.pdfIn PDF document text
    • http://garderoba.sk/images/_file/24316571720.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/nebiwak.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4622791c5---25238334943.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609078cfe13f1---jitiboxotosaximaw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/3aa06b9090452e2f30aae2f25efa24bb/genozagasu.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/93993847783.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160984b9c869b2---sifatakopurunu.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/8d0730d31b26ef088709d32e355ca85a/dikefefizifajufuniri.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/72891722714.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_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 11248 bytes
SHA-256: e028d0eb8d993b3bd6f9d59952f631221e89d999c5b039ebb17faba5f6eafa04
font_01_sfnt_off0001159c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159C 17872 bytes
SHA-256: 6a911ff354c2de5c3481b749e25bb4873813f67fb7238bb7ea3895098353fbcc
font_02_sfnt_off00014448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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