Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c12e9e2a7382a6c…

MALICIOUS

PDF

82.3 KB Created: 2021-10-10 01:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b8e37cf0d9c43b795393b7ad262ff5d3 SHA-1: 51bd1c01fa77e7fc109403ee5df5a30cb874b21c SHA-256: 0c12e9e2a7382a6ca5458e20b17b3ba429affeb2b3cc2f889b58812ab8bb5e7d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous links to potentially compromised websites, suggesting it's designed to lure users into downloading further malicious content or visiting phishing sites. The document also employs social engineering tactics, instructing users to copy and paste commands into their terminal, which is a common method for bypassing macro restrictions and executing arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • 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.
  • 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://olech-rzeszow.pl/userfiles/file/37694308846.pdf In PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/bakov.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/16309240997.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/eksl1l02kfdv5i7p14qdpk20p2/71172221506.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615c8798b264e---tokowa.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/mirusa.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133fa923c703---1569761232.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/mopavevasanur.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/13955524750.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021921652326688.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/mojefuxetukenobat.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e646351c9---14010278954.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614164a12f3b9---sujubepukovemedigozufe.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/p42nig5ld0jh1kahqv05r4t8a3/25598147717.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/15764628478.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/67439243602.pdfIn PDF document text
    • https://dulichsamson.co/admin/webroot/upload/image/files/zisezaguwemilunajig.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/lefixapar.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/70357703473.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/gazonib.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9b80c14286492cf48401e516d2abbc54/dixoxewu.pdfIn PDF document text
    • https://angem.fr/userfiles/file/tolonewawegotamefuvem.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/74496819950.pdfIn PDF document text
    • http://penzion.sarmo.cz/Images/file/37517698661.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/89298344799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=convert+csv+contacts+to+vcardPDF 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_off0000dae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 10320 bytes
SHA-256: 285936228092c52af8eed1af45423747ee615029fa20f5f9c81b8d0611f10076
font_01_sfnt_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 18684 bytes
SHA-256: 283f380b9e040dd8f50577e2b962c4db2fb4f5aec1077588ae5d102d7d461a89
font_02_sfnt_off0001233c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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