Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca18de90e7030550…

MALICIOUS

PDF

75.3 KB Created: 2021-06-14 04:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7b73f23a274d4b8d13910a4a349f4ad8 SHA-1: 95a30e2d7434a85c7d3418fc2582a48dbce48702 SHA-256: ca18de90e7030550c30d70e5caa889e9a4f2220a05191cf12b11ddad7cf238dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a lure related to 'softmod nintendo switch' to entice users to click on these malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=how+to+softmod+nintendo+switch PDF link annotation
    • http://acecaalcoy.com/userfiles/file/kewekirevidexuxokobo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcd7950c54---pudokasofe.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/uc0pciokoghmtskfqb1o52hgc0/47082200756.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/035bc687c75729d9ea3f0095d571ca0f/xobunige.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kesudewotojef.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4f5f009366cdf6dc606de3b29fc3fb53/mifisip.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083a2938d8a0---65756950885.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/33487492012586224a751a880b1fbc49/8676936738.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/juxiwazemadesuwutamumer.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d8fc0eda35af5f0cca2c495fe4938d64/6712199727.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d78d94b78---xibefutogutevemuz.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/18ac73a599c3b72576241cdde6032286/vokuzamejadurotatoj.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160949da27afea---xepozumolexivega.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/0930a58b044c4590e389f367257313d8/34380534911.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/4563d539a0d0a1bf2a72240f008a8012/49505906649.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/17927414ebbdd632f9b8b67f07b17610/dibuvivowubudunedibanijit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 4764 bytes
SHA-256: e4a5871f474232d6e1e7fd83498f0c50e632c227f936d814a28dd77de5ce6053
font_01_sfnt_off0000ee64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 10540 bytes
SHA-256: 3439cd5a27b2ea3cfa9f8a734dc0acf88e3d4390317b524f5c7a637df45fb75f
font_02_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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