Malicious PDF — malware analysis report

Static analysis result for SHA-256 112931bfe2e435d2…

MALICIOUS

PDF

90.1 KB Created: 2021-09-20 07:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd1e0f742ef32066e2eac5b2ca6d460d SHA-1: ef9083aae099b2a66d0c506dc427edac4676c8a4 SHA-256: 112931bfe2e435d2a84435390150e28e67d2210add854ac9d6bb2c07e47cf828
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=new+best+hd+movies PDF link annotation
    • https://principesgs.com/userfiles/file/pigutozojipakalagag.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/64873155519.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/xedatuporosivexomogoj.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/64344697831.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/naxazinalokekidut.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///rozifafizububofifiduraz.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/kiwezogevunizesovuxiz.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/vebajano.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/vedalekazexoxe.pdfIn PDF document text
    • https://funbugs.ie/files/file/9131010687.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/42263345825.pdfIn PDF document text
    • http://parentini.it/userfiles/files/20558185752.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161408f6011ac6---2003162983.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614252e9847d4---92632997769.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/sunul.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/77287471320.pdfIn PDF document text
    • http://bdnchem.com/upload/files/69861395209.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/99323616398.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/47172268766.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/1817149783.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/tiwegasiwetonejaz.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/mijameza.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_off0000fef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 17228 bytes
SHA-256: 514ef504fe16a1be3086f880af599d01f1f216cc1e0c7ead04dc8a7ea5e75d8a
font_02_sfnt_off000143ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CA 10372 bytes
SHA-256: fd4b4c5960de96ff7008051081985ab57d322397f63345f2fc0d748a8fa3d0f9

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