Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6214848396a52e…

MALICIOUS

PDF

78.1 KB Created: 2021-09-19 09:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b5096bf4c68706f02ff9106a1496fd1 SHA-1: 58f94c0e0017f4e1d7b818460b6a27e1c4e12b4d SHA-256: 6c6214848396a52ed35427f3121f57f2f52c79adefc2d97dcbf02f3f8f9d1aff
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. A high-severity heuristic indicates the document attempts to lure the user into executing commands via the clipboard, a common tactic for initial execution. The document also contains numerous embedded URLs, many of which point to PDF files, suggesting a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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
  • 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://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/d5e060c2bbdae7ad6e3132983c2c778d/29033405604.pdf In PDF document text
    • http://uktohabbarijamalta.com/files/file/rabedemizevoja.pdfIn PDF document text
    • http://boki.hu/editor_up/67982662884.pdfIn PDF document text
    • http://sentai.cc/data/file/20210916_232529_103.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/sokojupovaremiwabuk.pdfIn PDF document text
    • http://affectif.ro/data/Image/file/ximivujejazupefetumes.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/kajime.pdfIn PDF document text
    • http://nfc.soo.jp/file/moxipowagi.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/lapazofewu.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/dijisusag.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/15138641989.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/dakeluvureser.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/56855637378.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/livisaxepavaxeku.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/45974178426.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/mifapomof.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/31107953366.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/51467882366.pdfIn PDF document text
    • https://kiptep.ru/file/fenagozejitakejipeku.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/85371863244.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/38094292655.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/86433429458.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/xoweraluligiwexota.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/saraxulasig.pdfIn PDF document text
    • https://schmitz.cz/res/file/vedar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=tubemate+ios+appPDF 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_off0000ce7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7B 17472 bytes
SHA-256: 7bfb5224ace34782f084a2b0e44c75e74bf261dd56436ef3e5d6b4a74d30a642
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 10364 bytes
SHA-256: ca696ba8cddf6f2ae9ef10385c31d50a34a4afdb0b3b106e79d9d72aa3ca693e
font_02_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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