Malicious PDF — malware analysis report

Static analysis result for SHA-256 84102048392f3488…

MALICIOUS

PDF

77.8 KB Created: 2021-09-07 04:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 0e500740e5c9b6939810857b3141d63c SHA-1: f4a1b73f61846b2e2f47fc398927358ac5b3381a SHA-256: 84102048392f34887fed900ec5841e808becdeeda65c80e466cfc1b7dfba245d
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a large number of links pointing to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded JS points to T1059.007, and the overall nature suggests T1566.001 for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ingpoggi.eu/userfiles/files/77258999642.pdf In PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8e20b9376680c42813b735c01176bd9d/zotefoniwefikizan.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/88723963917.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/81687444609.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/zowapuzevevowa.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/62307599069.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ca9227be7---52532629631.pdfIn PDF document text
    • http://zubrcup.by/files/files/lepukazoxixufo.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4940d0492c---dutizokurin.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609260748c47f---wakalumifiretikobufepuze.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/20c4a760b5265299d6d3b49419a51c4f/zarabid.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca6ae9c4d7---jubawoxamevatokunowek.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb9075e691---27123676458.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6f528362---80536413969.pdfIn PDF document text
    • https://plasy.com/uploads/file/jatowanuvodafu.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8a487a3ca44b3547ba4edee5b47df0a4/jejixasazenane.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dec5e8dfe2---xanikemajiwa.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/03d81517dda9cfe84431500a487f76ac/gamuriwagenapolozofegiben.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/75779423412.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/90725366050.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b00994b93---74952817726.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/60687424150.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088176abce71---pavowududepafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=baldur%E2%80%99s+gate+descent+into+avernus+pdfPDF 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_off0000c71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71C 17772 bytes
SHA-256: 8d00c291095fc63555f97bfe99b6027d7cd3f128a8039d7fa38162b5bcfb35f0
font_01_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 11068 bytes
SHA-256: 5267b0ebdf52a4e22910681ff85644b752ad1137e0c108261c061be0f61ae8e9
font_02_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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