Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c767017c197f79…

MALICIOUS

PDF

83.6 KB Created: 2021-09-17 08:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e290cf13495b9e377e4bd760400e3ee2 SHA-1: d207cf4e790dfc38c5923996af5b99d932495148 SHA-256: f0c767017c197f79394f6e9aed19a8d1381601013e9c3ff47c0056c50554fcd7
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a social engineering attack. It contains embedded JavaScript and a link farm pointing to potentially compromised sites, suggesting an attempt to lure the user into downloading further malicious content. The heuristics indicate a 'ClickFix' social engineering attack, instructing the user to press Win+R or paste a command into a terminal, which is a common tactic to bypass macro restrictions and execute arbitrary commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • 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.
  • 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 https://lexcyberia.com/userfiles/files/rabumonugudosu.pdf
    • http://dichvuhieuchuan.com/upload/files/paladazidamufaridop.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0570b2fb6---kuvemibolojudubikixi.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143c595114f0---wegoxitopoji.pdf
    • http://garderoba.sk/images/_file/towidudewe.pdf
    • http://euhoca.com/js/ckfinder/userfiles/files/58164838502.pdf
    • https://shatalarab-llc.net/userfiles/files/66315730994.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342b9632e75---rekibu.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/tu122mn7e81iphu4f8pve1i0q6/67134590688.pdf
    • https://minjar.mebel18.com/uploads/files/6620761304.pdf
    • http://melly-incendie.fr/img_db/golokofo.pdf
    • http://ifap.it/images/file/30635640638.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140bf2ce2dac---saxojobujote.pdf
    • http://fujieshubao.com/zk/UploadFile/file/2021090114353973499.pdf
    • http://entryexpress.online/chapter_images/files/12303574942.pdf
    • https://drinkpoint.com/uploads/files/23769116397.pdf
    • http://quatangsongvan.com/hinhanh_fckeditor/file/nifadizewibomuketoselo.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161428860ddfc1---86076350608.pdf
    • https://hurghadalife.net/userfiles/files/vipusenu.pdf
    • http://myshiou.com/uploads/files/202109101112072427.pdf
    • https://thisissati.com/userfiles/files/rasanunowasuzutipujira.pdf
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/14245309223.pdf
    • https://cqhuaan.myhost360.cn/upload/files/09-13-18-33-13-81.pdf
    • http://shinex-auto.com/userfiles/file/supov.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dual+boot+with+mac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23d.bin
7892be9f7befa5a9b0e6cb5ec57df30543df3a8b976433bdb89f3f9a91a78af2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23D 18280 bytes
font_01_sfnt_off00011166.bin
d4873c20e0f0c06fcf9345ddf432ffabb2d9ab7538c91eb99bcdbdb22f63c295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11166 10320 bytes
font_02_sfnt_off000128b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes

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