Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8baaba61a0ebffb…

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 09:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2fcd0abebd772cc3903b9bfd7eafb70e SHA-1: 28f3303df101776195b80aec72e5947d4a8490ea SHA-256: d8baaba61a0ebffbbd17d2ea3786f12bcab92970271e9453a72ebfecb24ebde4
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing Trojan. Heuristics indicate it uses social engineering tactics, specifically instructing the user to copy and paste commands into a terminal, consistent with ClickFix attacks. The document also contains numerous links to potentially compromised websites, suggesting an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd054b700---97777725506.pdf In PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/58a2a05b70d606893dcd3d1bba671219/56988248896.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/66733501199.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///zabedex.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/amskiouqop3ro47att3ptu8sdt/rikoramutuduwe.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/cdeb34f47565c8e529659f3e0a3d0da3/74523238971.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e20ab32d0b---68299995924.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54b972d661---28114468249.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/bfe4479398070167143ea54faa8794e6/81915440825.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8da3f2b97---jexuluvutilejitag.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d8f68549b---57754124451.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/07b43aa70d82612105b9e85ff6a6f6b8/beramenejofu.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/9777861446.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/siwemigajem.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/jizipuban.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d07f703c5---gosobatakelinikokirato.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/d6d4b04544b01065d6c3528d050c910a/lozujefimobanuse.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7540f235---1961215919.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/fepowe.pdfIn PDF document text
    • http://hasyo.net/files/file/90128671155.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/27033481645.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/b4gjo963vgniq0hp9t941pcd37/21152280918.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/77360168965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=resize+the+pdf+onlinePDF 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_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 17284 bytes
SHA-256: 90c335ce69ec44f70af1bee65722d0f5c64b0c91dfdcbaf0e083de820b740c18
font_02_sfnt_off00013578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13578 10436 bytes
SHA-256: 6549f989ca389bebb622e2bdb7d91f19b3146cd3d28f70275cda88599b1af156