Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d79c6957e757bf…

MALICIOUS

PDF

94.5 KB Created: 2021-09-05 15:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 89e9da4eaeb4061e5c6ed4e944fa2334 SHA-1: d6862d1dd59b10c6d12d326fefb43fdd692e528b SHA-256: d6d79c6957e757bfa1c11df0d76c3dadda022b72d2a18b43e81161bc73cc0da4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads. The document's structure and the presence of multiple external links suggest it is designed to lure users into clicking through to external sites, potentially for phishing or to download further malicious content. The heuristic 'SE_QR_LURE' also suggests a potential QR code redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c680f065e6a9f28234180ab8ea4c96a7/werukobebi.pdf In PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17392916653.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/mizuvezopoxed.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/xoperozob.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/mosuxajevokanowajekot.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/77758677144.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/zewovizasoxuvunogi.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/busiri.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160703868370b5---duvedabaruremobo.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/jetopejemogozuzozixo.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a694fd0a---53229777773.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/jerikega.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5f5d55569---zukaripotebazudutupetukug.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6a8nb5v98t5b8g3kja3mkvgro0/zetabagegijezifexini.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/52335553355.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/viwajowutibebanadazaj.pdfIn PDF document text
    • https://educhina.mn/editor/files/88345419031.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/sarijebi.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/11861374019.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///78072295610.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/96089856488.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/90d05978361e88a8aff1a12cfb2b31c0/85978189929.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/4091739999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sennheiser+momentum+2.0+over+ear+wireless+manualPDF 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_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D5 19064 bytes
SHA-256: fc3e4131b1ef78edd61f95c6a345fca4431a026e86430d77c6609f3425b660e1
font_02_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 11008 bytes
SHA-256: 8616d3bf1718b8eba16a767c30e24cdf6fce25516a97419518ca8001b1ae45a4

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