Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd2faf9f7f5b54f…

MALICIOUS

PDF

69.8 KB Created: 2021-09-05 01:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b6db7fa930ffa0b28350e8a8f153fab1 SHA-1: eab86f8d3ebd90a8a318f5f765810c28e30de5f0 SHA-256: fcd2faf9f7f5b54f8183cd4eba1d5cf6a207ac6272c1a55328886fb1988259ce
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to PDF files hosted on various domains, some of which are identified as potentially compromised CMS uploads. The primary purpose appears to be directing users to external malicious content, likely for phishing or SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://myqself.com/upload/files/tufujusemipaxizoko.pdf In PDF document text
    • http://nessium.net/userfiles/file/nupizukilexoposux.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/dugavoranuxizakadomup.pdfIn PDF document text
    • http://fedime.org/imagenes/bidapum.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/m27kd1shq1qm80vjk3ic622p7g/jabibal.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/49173977236.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/33955968657.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b58cd83---todofijebofasa.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/xomofipolu.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/57526811088.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/8473065676.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e0f6555c---loxigunadokuwibigoto.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f12057cf---zometitifugibezizax.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb714e3650---18697747432.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a7e87e432a27a43394510d5609a68231/gewumivosuve.pdfIn PDF document text
    • http://www.polni.si/Images/files/lubixugulebibodutir.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/tebuxidan.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/16889299256.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/7426331667.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/e925fe1c1f4db21a4a1c17ad90daf61a/zitofawekuxikapabomigus.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/54586081222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=enfermedad+de+kawasaki+articulos+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D5 11044 bytes
SHA-256: 42eb4419d814630cb7c6724933483895e01c454ed56bb7cb274c22199af7d7f9
font_01_sfnt_off0000cc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC94 15000 bytes
SHA-256: 2ce815d6e34f00f590e2066d8c656f0121fa0108db5b8e71c52c7c5e15c5e2e9
font_02_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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