Malicious PDF — malware analysis report

Static analysis result for SHA-256 f724465c75b45064…

MALICIOUS

PDF

100.7 KB Created: 2021-08-10 06:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac9529f49b18c1196237691dbb4a0d71 SHA-1: c3e9ed4a32f2848222062b82af4931cc26567ed8 SHA-256: f724465c75b450647be6b921a1e113d1f1776a5c5ab9f386299445acac2049ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the heuristic firings point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://ijaetis.org/ckfinder/userfiles/files/13388788467.pdf In PDF document text
    • http://jnnycc.org/userfiles/file/jesudewipulazixetenifasez.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/07c4e7b04652ea7e8196c8b82345362c/47372206429.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/warivanabixudaxale.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/umbapmb8cq1l5qurjc8k9n03ec/welarasab.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081e258a6f1e---wuxolinatidazorinivi.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ebf94f7076b5900074c18e3159f8e089/30095773661.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607afd320464d---vasozurezukininuwonudido.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/63784577292.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/jixubariduwawesisaloviso.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/kawiruzor.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75074758810.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/tejepuvijajozuzezenutoza.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/kedevanasifujujokegotiw.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/dezunujojomixu.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/ginezupekukorisanixek.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd610e607---diligunovasipuwinotugod.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e9f6dd79f---xoxuzab.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/baxunofofujudelivi.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cff776bba---29560460016.pdfIn PDF document text
    • https://kildevangen.dk/files/24696223610.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f7fe9df15---jomulukekaxubuxonug.pdfIn PDF document text
    • http://amandamaitland.com/images/file/669738173.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/r1prig9t6dhk33cdju32iop054/nudat.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/nesewanifafibiropidag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+use+financial+leveragePDF 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_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E67 17184 bytes
SHA-256: 3bfb0e00407aa821540836e93c8554ae550536a22f61b948920bef5e77df2e17
font_02_sfnt_off00016b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B60 10756 bytes
SHA-256: c156fc281d3fa9ffacc84c46e94afc799de12e6a54c1a0b7d7beaf7d03ef33b7

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