Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0297718d75df713…

MALICIOUS

PDF

87.0 KB Created: 2021-09-20 19:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8cf56080a877fb9a4c57eeff4b01bb60 SHA-1: 4984c188adb0784815b4c03cd10f3fea484bf890 SHA-256: a0297718d75df71377dd10b1acbac28c29fee376ec5dec177088487a118eee5f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The presence of a 'password-protected archive handoff' heuristic suggests the document is designed to trick the user into believing they need a password to access an archive, which is a common tactic to conceal malware from initial scanning. The document also contains numerous links, some pointing to compromised CMS uploads and others to disposable hosting, likely serving as download locations for secondary payloads. No scripts were extracted, but the overall structure and heuristics point to a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://hockeydh.com/files/ups/files/zatogabofodu.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4f12934d1---tujedoxovoxuraxefi.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/70707432524.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/nopexiwovazutaxajuwi.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/92488109517.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/jufoxoziliv.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/negeratajameritiwogag.pdfIn PDF document text
    • https://iwistw.com/upload/files/89144118881.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b358334707---9225967348.pdfIn PDF document text
    • http://abpaluso.com/upload/file/bofisomelotumorimaxo.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaf6f84c2b---garafetom.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/30211909441.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/17125175639.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/7862865165.pdfIn PDF document text
    • https://grouptm2.com/contents/files/94822514967.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/82101621913.pdfIn PDF document text
    • http://cityfate.com/files/files/zorememidefotibubibi.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/74888650760.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/16725319480.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/kuxatowutabilawiwako.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/74134361525.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/46444969282.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/foxiputazataxigidi.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/67300479952.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/84220796224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+do+i+bypass+a+pattern+lockPDF 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_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 10928 bytes
SHA-256: 23a7993c57368853fd7397e6b232d42761ca5bcb79757f2ec05ef322114cd865
font_02_sfnt_off0001184b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184B 20604 bytes
SHA-256: 794c5e7a15ae7db8aea970d8c0fb24d8461f1785f5dfd775c88ee0b578143d51

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