Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a65cad5f3ded77…

MALICIOUS

PDF

198.2 KB Created: 2021-07-18 02:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 99299ac157ab949b3883bee4c9dcb127 SHA-1: a6139a4d9ad353b9a9d4bea260394530c04e003e SHA-256: b6a65cad5f3ded777775bb4bd0b8ac1d767fda1b93213189202cde5348008f51
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious payloads. Several URLs hosted on compromised WordPress sites were extracted, suggesting a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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
  • 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.
  • 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://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092969382f89---tokifumofaxutizun.pdf In PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d0b60c4e03e268c00c5bb1273cd2e944/16982692580.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607544a34723d---jukasojiga.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/zulovu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/5luh03vcp5ambdqalrh5eve4s8/judowap.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e518be2b492---benokerokemelidugewetal.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099e3c84d5d7---90823946470.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/limupobaluso.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/108ed491eb6a1afc05661dc99e3bce7d/40489264809.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085c432aca13---nitomu.pdfIn PDF document text
    • https://schmitz.cz/res/file/33861664560.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/tosizatata.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7233facc96ae861a6e6a26aaed92a76c/jikasajaximitareb.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f290ab59a7---44498923032.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a96a5a52d6a56c50e293b64536eafe4c/34375038612.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/76121494988.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160908683133e7---jufufewotetewemanat.pdfIn PDF document text
    • http://arablift.net/userfiles/file/xusasudiloluzuxaputazazed.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/l0g29h52sgu7sefpai2cr59g74/44858342731.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4febcc107---gibuxezotupugotav.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/cad8d498a8f4c8a128b18b9c6481a405/dasanubegufunajobibi.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/watumaseferin.pdfIn PDF document text
    • https://coevent.ru/upload/files/53018268740.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/60884141975.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecfd2dd69f---fezesitesatimevozonamotoj.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07cc4b174---dadabuzo.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b2418081f---89119790668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=heparan+sulfate+biosynthesisPDF 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_off0002a790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFA7 10800 bytes
SHA-256: fc40dfcde725c63e3d30ec993e3f7a9f43998bc8c13b16924e3e7136f71a38b2
font_02_sfnt_off0002d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D83B 19048 bytes
SHA-256: 61fc7951e983772dfc76d31e2d2400a9243b05c4ac4efd3b070291723f56c554

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