Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b866584df1055c…

MALICIOUS

PDF

204.4 KB Created: 2021-08-01 07:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d65326f46f98134f94b97f9ccf0250b0 SHA-1: fe5475a8e6d1f2ae4f8c74156794c14a9fdcf6f5 SHA-256: 69b866584df1055cf10c74b74a960f59a05eca2c6b21623a0fb2569c2f5a84a1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, including one pointing to a compromised WordPress upload storage location, suggesting it is part of a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

Heuristics 5

  • 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.
  • 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://narnivet.com/userfiles/files/26641280139.pdf In PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/50e3eed18d5bbf0fb39c8def508206cf/zogidudodezawigukowodojej.pdfIn PDF document text
    • https://haidangpc.com/contents/files/2074921441.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca42c7b5b---fobaza.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e760b0f13---jozawubetonejeduzuzovufop.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/85468552668.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/6fdacb876ff18914ddf9e663c9f1054a/bogone.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607828f5e2107---zuwenaruretezuvikesexoxez.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jevipubujidiririnujimi.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1dcq7li3r0n3oajl5o7s4ksqj5/junup.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/nutag.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/gewawizafemufeberadunuf.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/nuruxesifab.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a09beed19c---xuregomekikelaketakozar.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/85941081421.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4d41594e3---povuzalunoferomuv.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/53681019456.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/48270071836.pdfIn PDF document text
    • http://lalinpress.es/ckfinder/userfiles/files/datigerufedapopavusugo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c5632a55d85---bimaxu.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/radolujekev.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/78882535447.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2f5f76a66---28956379051.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce158c08c5f---70201736313.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082346f78007---78766033876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=rhetorical+triangle+graphic+organizer+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B507 2284 bytes
SHA-256: af1ccfb20332d84635ae6718c7aa6535ab03731639558c17ca4477fb433d50f6
font_01_sfnt_off0002beee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D700 19720 bytes
SHA-256: 8fe3c7069bc48e124e919f5a334e7b3912659a033ccf3275d6295d5ade3e9bf9
font_03_sfnt_off000309c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C0 10836 bytes
SHA-256: 77e227844eae58a95679db711ab95d7a9dd574c29f2c5b8507dc887cd2deed39

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