Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6afe2afabaede69…

MALICIOUS

PDF

104.9 KB Created: 2021-09-20 20:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e99d5db931d1abe132b147a8ea2b4d97 SHA-1: 44bbe143491d2223089bf5d6e6c51f90379dca52 SHA-256: c6afe2afabaede69a196f252fd13046d908bf072f3441f2ecf47b522ae10a05c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://huntic.ru/uplcv?utm_term=architectural+drafting+standards+pdf PDF link annotation
    • http://sunnyten.net/userData/board/file/guxunokatilimo.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614141bc15a34---40002741465.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wivikejotijupokikora.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/pegewilomejapope.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/jiwazexamalufoxasixa.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01db2af99---72419156559.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613231a4a236e---95552530954.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/pakapopemukanabibaserupaj.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/10643636242.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/45037251210.pdfIn PDF document text
    • http://aa-nusd.jp/mafidoteba.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/32234214491.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/tonenadegupapusomug.pdfIn PDF document text
    • https://togeltop.com/contents/files/molorapurabubexiva.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6bef9283e3626a43d030931eaf0329e3/rirupuvivenarok.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/84561847587.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/74406119648.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/86218591449.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613413e47fbb1---xixeretupogiv.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/zuvenobekaxililanutarebu.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/folisaxexu.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/6195323259.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/33313819104.pdfIn 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://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_off00013409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13409 18888 bytes
SHA-256: d376630eb672cc1d6ea6984bf68508c48c048fdc06bbc32d716081ff3bead820
font_01_sfnt_off000164f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164F2 10860 bytes
SHA-256: 5bb600b8a6fe5f2c626db01d97059841a9c6d92319c652c6af0944cabf3742d2
font_02_sfnt_off00017dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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