Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaf170799aff11c…

MALICIOUS

PDF

72.1 KB Created: 2021-06-20 06:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 94b655e6edb140263f61edb73e1a3beb SHA-1: dddd72e854b25673512e457b4f55e3379f944dce SHA-256: ffaf170799aff11c7306bc613e6840461e6bf5f5b801a81e4cb6fb0268abad2a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised or disposable domains, likely intended to trick users into downloading further malicious content. The document body, though heavily obfuscated, contains references to movie downloads, suggesting a lure for users seeking entertainment content.

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 http://gospel-pour-100-voix.com/fichiers/newsletter/file/38531486126.pdf In PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/nfuhrmvmq6l7j6n00c5316rq54/ziwudeze.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/87947246291.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608176b1a41c2---25860631419.pdfIn PDF document text
    • https://mauspro.net/upload/files/binomiluxujoj.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/6578188ac38e93b83964d15383dd6f7d/48565013809.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b13a7001e---xumefefezilijelubevofud.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/91863995419.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b1d83be66---wasogixuv.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd83c1ef223---2443183737.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5698b111bb---mogowunonolilesurawinu.pdfIn PDF document text
    • https://x-software.cz/data/file/ralozubobezip.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/58416267138.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2ab07d8ce---50716336649.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/91a69d756e8f60dc7959c6d87cf28162/48893955484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=sultan+hd+movie+download+tamilPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 5044 bytes
SHA-256: 2f5249b61883d5c2f8c97faa5b45b2ddbcb7ef43908730d8a4ec79fb1a573ce8
font_01_sfnt_off0000eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF9 10736 bytes
SHA-256: b9a11a58f397b81865bfe14ed89811cd1bbda977ba1a0f64c01d4d0ed2ceab81

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