Malicious PDF — malware analysis report

Static analysis result for SHA-256 006ac3a1bba791be…

MALICIOUS

PDF

78.9 KB Created: 2021-09-14 18:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d168eb1a1e13d3aa0954ea4602e0e1ae SHA-1: 1db02ce8fc3ed300986fc34ec3412af76b1ad020 SHA-256: 006ac3a1bba791be0d086d0ab9e8993290543663dec506ef9abe860678feac23
214 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, some of which are hosted on disposable domains, suggesting a phishing or malware distribution attempt. Heuristics indicate the document employs social engineering tactics, specifically instructing the user to execute commands via the clipboard, consistent with ClickFix attacks. The embedded JavaScript likely facilitates the execution of malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tufaghanafc.com/js/ckfinder/userfiles/files/81062864420.pdf In PDF document text
    • http://ariogalospspc.lt/userfiles/file/90250456074.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/gipapagesomokosuve.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/89433332004.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/tidajexapesakuboma.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/63070663531.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/sutoximefunadofuzujarude.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/83680402387.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/xidalufutokaro.pdfIn PDF document text
    • http://brukbet.com/user_images/file/62149624327.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e0b95d33c9c93a43de101831a9b7bd48/69452192041.pdfIn PDF document text
    • http://apcmagon.com/userfiles/xofalinupetuzowuzupikud.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/24835661155.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/boxelowemojuwumebunedopaf.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/sovoputepaxu.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/19995198612.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/gupisagiranepu.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/wesakaxura.pdfIn PDF document text
    • http://jaatkinson.com/userimages/kevazosomolajadejiga.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/96729221306.pdfIn PDF document text
    • https://businesslife.com/content/files/96089831374.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/difibuluxowarimidatojov.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d56f35d021---65562539698.pdfIn PDF document text
    • https://udruga-invalida.hr/files/78253231279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+i+paste+from+clipboard+on+androidPDF 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_off0000cdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 17872 bytes
SHA-256: 9d4b9004570325163450c49494ac599653914b97ab8a6cf35233b644f3a545b3
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10996 bytes
SHA-256: e9afd51bc79d80ceee9bd2f928d6f0dca703e123d55cd3a6f42b40c4ca905d46
font_02_sfnt_off0001156f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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