Malicious PDF — malware analysis report

Static analysis result for SHA-256 0750e5e9f0aec7d3…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 14:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6bf609666ed3b7de8fa64367730ac015 SHA-1: 74563a92bd90de8c890a125f2d207f0aed327c1a SHA-256: 0750e5e9f0aec7d38802b44c8cb8c93a6215cdf399cba472490ebf92f8be2333
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://greenlivinggarden.com/htdocs/UserFiles/file/72363250187.pdf In PDF document text
    • https://ajitcoatings.com/uploads/43229932819.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/sipukadenukinevelos.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/kokodorofofovixutejofe.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-6/20210906074928348119.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/sukufaxiruvibev.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/modowiberina.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/wilizafonas.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/29901579570.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ff9d6a5532d08fbd3926f59d1541d16c/63478295215.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202108230229525844.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/30125735721.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/32235397853.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/gobosidimutetuxipufowifi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/499ee027f1453a43b85076bd411568ad/15669539873.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/runenu.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/b30jn9r5ivu2mh9tk4foketlp5/xebuj.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9e186ff7e0b11ed8a2b37594724da692/31784036601.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/tozapadebadele.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/0fja3hj2i0f96itpo19igahmdq/kusuzonogalosulegafuxitol.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/64814842566.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160728914ba55b---laduxerisavikavuvijew.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/zujitu.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/ginekoruzewogezajojim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=lego+boost+ideas+book+pdfPDF link annotation
    • 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_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 10612 bytes
SHA-256: c89c2e9e3bd7bc3bbd828ccf547759413afc312e981a511fbb48487ce82a1c5e
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 17496 bytes
SHA-256: e3fdefb41d0a99574ecd4d5b1248f34fac17c4294e1a675d58d746104612dbf5