Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1ac8cea22f3a8b…

MALICIOUS

PDF

100.0 KB Created: 2021-07-16 02:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ba0185277c68905bc6a840ac4e65ecf SHA-1: fce5c0814f1802f2e1869cbdea4edc50c6128d4f SHA-256: 5c1ac8cea22f3a8b61a887509b1656b8d95c85840c4ba21605d145baf9aebeda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. Although no scripts were explicitly extracted, the nature of the link farm and the detection names imply potential for further malicious activity, such as JavaScript execution or redirection to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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 http://zhengfutz.com/v15/Upload/file/20215141651273795.pdf In PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bba7b838d4a---53513221975.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8d807fe8a---gedasavidorokopegaku.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/216b4fbfdb7dd433d483aaf172ceb80c/jeridedapojo.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/gipunego.pdfIn PDF document text
    • https://arerp.kr/data/file///38050332614.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/89359256912.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/20722244566.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/wepogudisagolaxupofelew.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/31508674530.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2a90f5d8a805b57ac5bef0c2e9078c0c/95015831309.pdfIn PDF document text
    • https://sinarwaja.com/account/files/65732588211.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/menaxixur.pdfIn PDF document text
    • http://afro-safari.com/upload/files/47840604898.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd9720b0f4---75112434234.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/37082839914.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c918e383126---7264110552.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e8c592f55---35102875899.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zonif.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/34007988126.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecfb71479e---niziluzirakufet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=bespectacled+in+a+sentencePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000144d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x144D4 20700 bytes
SHA-256: 13ac1893f04d6cd2175b7ab47c1fff7feffe5b24375f4fd512a8ae07fd09f3fd
font_00_sfnt_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 5316 bytes
SHA-256: 227fddc7065d3b86ed863f8623b13d3029b52c5664291a7895be460d4d77d502
font_01_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 24356 bytes
SHA-256: fbcdf2715303fa134df3e9994981ed0267558666887d19cf6a2b410c320daf3c
font_02_sfnt_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000168af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168AF 10340 bytes
SHA-256: ba7f38f4aa6f7f045a21d8b410e5d45803514fc72f4d613a0944966b565b91a5

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