Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8d35d2267648d6…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 06:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b73edb3a36e0f64a99b6c76e48f7a3d SHA-1: c6c3583ca76fb06ce29a872b40c75fb278c8fea7 SHA-256: bc8d35d2267648d6869490a4d5757cf89fb76c1149d1015af906549a3e6a3e8b
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution T1566.001 Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document exhibits characteristics of a social engineering attack, specifically a ClickFix lure, by instructing the user to copy and paste commands into a terminal. The embedded URLs and link farm heuristics suggest an attempt to redirect the user to malicious content or download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://archism.ru/uplcv?utm_term=manually+activate+windows+7+command+line PDF link annotation
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e5e7550ae---juxovud.pdfIn PDF document text
    • https://nasikampung.info/contents//files/89488687658.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d694ab6ddf---zipot.pdfIn PDF document text
    • http://hongdacable.com/d/files/desulepixepatil.pdfIn PDF document text
    • http://espwireless.net/uploads/file/zomofizifedewifudinutuxo.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/puwise.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/85952268029.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/rg9p8jfqcobmtkc5sljotiomi2/zakamerenovosefeja.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/h6bojaq102r0lejdi4j5re1fli/98018182303.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160806ada7625b---7274803822.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/terijawifuvabupekur.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210716152103584.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/37920712222.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/61664588098.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/pajarow.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/12080671236.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/susabenetogatu.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/xikexagujedaz.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/birifumofuvewewifoxitu.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/nonifisozavutomo.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/56821233217.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/59727409271.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/kixudafijogopoperowo.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_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 10840 bytes
SHA-256: 91ff1348b220298904b62daa0741b067bdcb9a913f86b7648a09aae7bdf18d69
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 18268 bytes
SHA-256: 43abeb9c098123222276bae04ff1669b4f8514b7a9d61f6b5b3a990732a9fea3

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