Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6c47690372052c…

MALICIOUS

PDF

75.3 KB Created: 2021-06-05 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c29d6266c3b930c706d3e7bd6857b4b0 SHA-1: b553016c68a8089d38b972055555acbdd210b04f SHA-256: 1b6c47690372052cb5cdd260ee1e3bff8074a004e5933461acd9047a27435465
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it is a phishing or trojan delivery mechanism. It presents a lure for 'Yousician premium free mod apk' and contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or downloads. No scripts were extracted, but the presence of numerous external links and the ML classification strongly suggest a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=yousician+premium+free+mod+apk PDF link annotation
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6df7e7a426e7e03953730bd7c73c6e8b/vavekanudarovosiborulan.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725a10414e4---fifapimopowuxusirogijidum.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/59520486937.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/faxivore.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3282dd401---zusotuko.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094b57f41130---96880866266.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/3c3a4900d3d026a8aab50cefb1312bf4/kijelatilexipumovif.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/dabapetibefolelubozopije.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d291b6223---xudutadalu.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/35675203566.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/9462deda351d7e0220fa301713fbb2fe/xomenanujozufanajox.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/8299ce54fc7204d4551257b45c4acf25/xazananedefotirus.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/0037214f57e9128bb44134af0ca4f2e9/bapigona.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088edfd4a259---98663209776.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/70073010798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 5292 bytes
SHA-256: 536b862e101b350b5711c97b78e66a9cd0709799b1c6a73fbaa1995ff5b977bc
font_01_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 10752 bytes
SHA-256: 43e12042a58898b59b71c8c15082f4ace1d799b68d33b2639b9b4af63f9993bf