Malicious PDF — malware analysis report

Static analysis result for SHA-256 5506d3930a79af73…

MALICIOUS

PDF

77.2 KB Created: 2021-06-09 01:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1e1001979db80b5ce14e4b494cc6fdfd SHA-1: 034279a108c50f617dde6cb597e1fccd786a3312 SHA-256: 5506d3930a79af7330494994011d7cc2bb2bbf1ac89327087a3ce722a19c2dbc
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, strongly indicating malicious intent. It contains numerous links to external websites, many of which appear to be compromised CMS uploads or hosted on disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, contains text related to a game torrent, likely a lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=zelda+twilight+princess+gamecube+torrent PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e407dd0410---kixofoxovaxela.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ece7366943d27ab11a29fdfd17c03606/93514159824.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/laginotogelazegenakidewas.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ab671d8de34---moposobikajogijidozu.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/224dda1808d4d69c2c64327946c78431/61086423657.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df80e0ada2---nuzefurutamabu.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/62644870df83201caf34224528dba1a7/tasopijifuk.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a5f276550---24730203789.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/noduduwififaguzuwakijuliz.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/guvuxexisotutowizuxor.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/uvcg9g92mkvfo0mt23j2si80f1/nujolizujegamevofo.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/nuvupitixesatuba.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3e2f70005---83434513307.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160848e916185c---lubogebozopamawikinusi.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/solilenexaripanejaxamaw.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7dba02be---gosogiranukifokedirubaka.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2f5e70eff---mexeguxaromewozozeduxetex.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/bilanaliva.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000ef26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 5676 bytes
SHA-256: a5dfbe8c68bd360445af466c4029439d2e4780a2a4bbda92396e6d26737dfa87
font_02_sfnt_off00010253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 10856 bytes
SHA-256: 5e56311517c4a6e85997ec6b784af5c210b62011b811f74895b4a026d53db6c5

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