Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1703b7dc760ce20…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 20:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 58550dfa4354226f4cce9d6d2456dcd5 SHA-1: e8855096f73c3db7d3bc60b9015ab644b647ac42 SHA-256: d1703b7dc760ce203a4383b30e91c41f9ee3a79ed103f789973e7ec0276500b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or contains malicious content. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous URLs, including those with 'utm_term' parameters, suggests an attempt to manipulate search engine results or direct users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=2013+mercedes+benz+c250+coupe+owners+manual PDF link annotation
    • http://ateliergermain.net/sites/default/files/file/vuxagoramuzosuk.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/df6932056c32efcdeab6c88a1d6bce78/55664892296.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/83436429732.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610489b2959e5---befenobonifofipa.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6d5ed5bb37717479815cedde02293d0a/46366080289.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/54969551644.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/78694855351.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/5aaab62b791ab2097400bb483b1fe54a/buboli.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/6mag18314i1hfr49rkac1k4jff/xiberutonafe.pdfIn PDF document text
    • http://budka39.ru/files/pefuludiziveripuxojetivas.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16078e34fe6e9f---lazuzezafoxerojetazavepem.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/rr1e1k3jorv2ujefit9frm1tc5/lerogolivurowafigiwop.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/93631277422.pdfIn PDF document text
    • http://taxfreepoint.com/file/nexagato.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/jovenoziwawomeme.pdfIn PDF document text
    • https://datajournonepal.org/files/zomutimaj.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/xumokidogugigi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/9b6974c57c2e87abc31eb63e04cc8611/tegugax.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/79580275042.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/supumup.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d242505458---naroli.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/paxasobubug.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/40132403465.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/cfe734a41a0e17760eb7d78eb0303916/73112564392.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_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 18832 bytes
SHA-256: 50177ef487456b4548635e8ecf8d87dc2ccb07ad5e2caf83b39391ab984abacb
font_01_sfnt_off00010dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 11376 bytes
SHA-256: a321683020c83631dc44cf584de98458cfcd8700873e31b0d6aa507b77e79860
font_02_sfnt_off00012884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12884 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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