Malicious PDF — malware analysis report

Static analysis result for SHA-256 043eee8342869cc2…

MALICIOUS

PDF

90.9 KB Created: 2021-06-27 21:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6274894d4cce1922664b51cf0ba03837 SHA-1: 02855439e553e9cd4310a834951b7b1189498cfc SHA-256: 043eee8342869cc24b4b009e11d9a72f9b599e19d008230a6779a0c2ce3b0934
252 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting. The document also employs social engineering tactics, specifically a 'ClickFix' lure, instructing the user to copy and paste commands into their system's terminal, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 10

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://khodahoanglang.com/admin/webroot/upload/image/files/21699176009.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/r8m7k3r67alejl3kbjt3ob2kcv/26955826906.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7266ab3ae5c5ba527e45a05d500ad6c3/misirisesimekimodoxeg.pdf
    • http://teplolux72.ru/upload/file/41324778115.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/ae20713e0f5a32fff0200e8ea918e188/2726941580.pdf
    • http://55pluscommunityspecialist.com/userfiles/files/sosuselaxulugogej.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b916a930fa---fipuxugizuwuruwozom.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/demuretofexune.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b766f2bc485---85708031170.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d879888bd---49539982744.pdf
    • https://a2designbg.com/userfiles/file/38867745561.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfa8f55a7a---belevigorisewubiporuveto.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/netiduxo.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447a5080c6---wosijus.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7874055ecdbaf7ca2d9d6b0126b4945c/penelunexetupot.pdf
    • https://medtek.vn/storage/file/66532903473.pdf
    • http://alexlunacoach.com/img/editor/file/feturigeb.pdf
    • http://rymwid-training.com/userfiles/file/50193423795.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16239282268087.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/sulozejom.pdf
    • http://mwflower.com/upimagesfile///tiruziguximisuvizi.pdf
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/zadirifabasoxagozorora.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=isometric+drawing+2d+to+3d
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/705ba472b73ba1a0708c109db8d96f15/37068482602.pdf
    • 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_off00010110.bin
e1161645267d329ad5039ccaac9e264cba738fe504a3bb574f8cbf005a8b2197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 16864 bytes
font_01_sfnt_off00012cff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFF 16792 bytes
font_02_sfnt_off00014516.bin
c44fb792738003aead53f43427f802ef407a2f4eb0dbfda505cbad1e605e4dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14516 10996 bytes

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