Malicious PDF — malware analysis report

Static analysis result for SHA-256 75451c64ec956e34…

MALICIOUS

PDF

78.4 KB Created: 2021-09-23 08:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd108d38353331f69833eb68b3231299 SHA-1: df73c3d1f8ca08ff347c9321a3e194865b23e47b SHA-256: 75451c64ec956e34a0e6fc507d68245c109d7cdebe8f59be0cdcdf7726bf047f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://www.adarshvidhyasankul.org/userfilesfile/xemefarazubomemexuni.pdf
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/wirisopazajasenetu.pdf
    • https://matrainagycsalados.hu/userfiles/file/80536771000.pdf
    • http://manavpublicschool.org/manav/userfiles/file/32648848390.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143bf26f068b---6621363951.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/lanevetudupotomipebi.pdf
    • http://hig-hegmann.de/userfiles/file/57061412042.pdf
    • http://xprchemical.com/upload/files/14988233679.pdf
    • http://mistral-paints.cz/userfiles/files/gonoro.pdf
    • https://lean-ds.com/upload/editor/file/xexon.pdf
    • https://austarpharma.austarchina.com/upload/files/ropuwejimi.pdf
    • http://americasbestwingsbeltsville.com/uploads/files/dunolafajavesapusapit.pdf
    • https://consultemergingmarkets.cubsindia.com/files/wobuvuzag.pdf
    • http://konferencii.org/web/uploads/assets/file/ronisaxujaz.pdf
    • http://mybed.tw/uploads/files/202109210630143087.pdf
    • http://www.urbanwaterways.info/files/paneje.pdf
    • https://sthouseluxury.com/upload/files/siteferodusujowuforudo.pdf
    • http://thephinhmienbac.com/upload/files/93889651464.pdf
    • http://rspon.pl/images/wyswig_images/file/bonap.pdf
    • http://bastola.org/userfiles/file/41460857867.pdf
    • https://predial-rua-nova.pt/056-CovadaLua/images-editor/file/93864054674.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8b9fbad78---55256652051.pdf
    • https://pasarant0g3l-turbo-h1t.com/contents/files/lanifixurunobaxufod.pdf
    • https://majubesar.info/contents/files/79814192105.pdf
    • https://www.hkha.com.hk/ckfinder/userfiles/files/gopodom.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bad+jokes+adult
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d075.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 16792 bytes
font_01_sfnt_off0000e88c.bin
cc91c78942d78e1f360137f60c141a3c5e0e75ac1b9938a34594f27b7009a43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 10320 bytes
font_02_sfnt_off00010007.bin
ff62f8eb69bdeea84a25de45c8d082cad260e960b8f92d530f4631ccb674994f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 17232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.