Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b45c45060010dd…

MALICIOUS

PDF

75.8 KB Created: 2021-07-15 20:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dde80abb13626f47842ddb738fe7ea28 SHA-1: d65940470bd073dcedb963404f7805058a243754 SHA-256: d7b45c45060010dd5d2105140a1258da47fd33a6ab1e76e47de68862ca213b01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, likely intended to direct users to malicious websites for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interaction by leading them to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://crysiq.ru/uplcv?utm_term=state+legislatures+by+party
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ghbqvo74ccjdu1qimukg0lo640/vavivijogonizurebasuwubex.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/83bd32d3961dad98210af5ca09c04424/94473834430.pdf
    • https://hrmconsulting.biz/upload/files/zusanaladumobumajeze.pdf
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/bekidenagem.pdf
    • https://dm288.com/slicice/file/mobalikitegojakovuko.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/14525245048.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b053c51d88f---77253819346.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/b97edd29c30c190c0f021acee2a5754c/59719670581.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608963eac60fc---dunodewapefesuji.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/82182886994.pdf
    • http://tiendanatacion.com/noticias/files/19371748870.pdf
    • http://computer-rudolstadt.de/upload/file/59248922682.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160774b2cdda0e---dawiluruboxapawofuga.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b667a85f0b9---lakijigewomesigetopedasib.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9b7ea7f9---25719666967.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c766d8e09---boxixowodaraterexozuse.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/89d56f5fbaf7221838b968f2ffbaf97a/99861837134.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ae72b2a6b---keturinatuluwe.pdf
    • https://snqrsl.quebec/upload/editor/file/jeragafowipagipe.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/nl76fc2itd34bio8p1qe6ob636/66961318291.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b629f670a1c---rinajij.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160984603e4b13---21691353450.pdf
    • 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_off0000c73b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC73B 16792 bytes
font_01_sfnt_off0000df52.bin
5f0af45a263cb1a401389b3c9fb7c30d3ddcd2dae436805577cc39db43496415
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 10632 bytes
font_02_sfnt_off0000f78d.bin
706ffd1288a6306c5f20bb3d8181fe041821e0e106733fa152c28b3737c2a428
pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 16328 bytes