Malicious PDF — malware analysis report

Static analysis result for SHA-256 45932ae2e4d97560…

MALICIOUS

PDF

81.7 KB Created: 2021-07-12 22:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65d87c6765c5237a34bea10e0ea83723 SHA-1: f8fd3b02417bb10951990cf2129faac943e82f8d SHA-256: 45932ae2e4d975608423a1fa014914394355ac8e3578c70abf1334720d5b7c68
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or appear to be part of a link farm designed to obscure the true destination. The heuristic PDF_RANDOM_URL_LINK specifically points to a URL that likely serves as a download or redirection point for further malicious activity. The presence of these links suggests an attempt to direct users to phishing sites or to download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://turbooto.vn/upload/files/lovowaligitewuwav.pdf
    • https://bawwabatrizq.com/userfiles/file/19567272964.pdf
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/puxokuvizal.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/82575431583.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c24748268---25738833371.pdf
    • http://posekatzahradu.cz/files/file/ribizuvasupewoperow.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e5417beae7b92441387501f212d81a43/72686844866.pdf
    • http://www.asap-recruitment.net/upload/file/bekeloxedusujomavakul.pdf
    • https://caffedisanto.it/file/xisopuzuwalila.pdf
    • https://dakhoathienhoa.net/images/files/15253145212.pdf
    • http://ge-mak.com/files/21092363088.pdf
    • https://kawanmto.net/contents//files/dokawexirupolaxigabawore.pdf
    • https://mobilieroccasion.fr/uploads/file/81044739477.pdf
    • http://tcurryproperties.com/konadnew/userfiles/file/91890457011.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a574ed23b0ac227ce822b12027f85422/37117240961.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/lsgfk5qeh9q2kl52p7avpgbc15/99413959539.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/atvf3adjutvvkagdcnfidr0365/33356206565.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3426618dc1---pidetugu.pdf
    • https://strategieb2b.com/userfiles/file/81783807444.pdf
    • https://mabuksusu.com/contents//files/tuzot.pdf
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/27456098348.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5ceb1701---pulixowonujafediribuputa.pdf
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/nodefodomulunojiz.pdf
    • http://cocoal.com/uploads/file/43992054809.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=am+alive+by+celine+dion+mp3
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf8c.bin
bd2620defbda2b4df14ad32bd25ccccc8efc9733fedddd7f52bfaa7c7e68d590		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8C 16812 bytes
font_01_sfnt_off0000eb43.bin
9684966318ebf5d96d7d8c7808ffa06b4c8187ad050a851637e1811c519e3a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 10780 bytes
font_02_sfnt_off000103df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 16792 bytes
font_03_sfnt_off00011bf0.bin
8e7533173452c77052bbea03cc3429ecfbdd79c9b68c707c184bc26ee0f2f4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 18316 bytes

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