Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2213d6739ccd789…

MALICIOUS

PDF

254.9 KB Created: 2021-07-30 06:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2c5c6bfa3c658bfd53f603d187f46276 SHA-1: c911be02905302e6eefc10659701ffea1996ad55 SHA-256: c2213d6739ccd789a6851d27064b7f9ce73ebc4f661e7acaa9291508fa8d3650
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some pointing to compromised WordPress sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to decrypt a password-protected archive, a common tactic to bypass gateway security. The embedded JavaScript suggests an attempt to execute malicious code, likely to download and run a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.tamtrebinhminh.com/public/files/zufowigiraguwogexixu.pdf In PDF document text
    • https://blugarden.eu/file/noribotusizawewazewoset.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/xarinewojazeketavepuxowep.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/73726465095.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/fupalologeximewowelex.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gulepuvodobetese.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6239cd2a65---dikapalirudafo.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/baxivavegilel.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/160505838060a74dc46d15b.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/57377008709.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/1aeac31c39a77424078677f67527d56f/66293739393.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/ponepajajevivitigireg.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/lezimufo.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/wezajalamovineb.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/kijomiduxububoxije.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/96555654241.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/vi70v22e18s95k5m2amq4r8895/67566550866.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/getinikaxebipo.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/busasu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9b8b2b51f---fogizojusomojijale.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/rqdfhgg725eds3orm1qujaea94/44466032355.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/tulosoveture.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe975724be---pozipoxejebi.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc6b9e4c70---67922345663.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/fvt3a2iajuv1pgkv7oe4oc8n54/xogalegavasozum.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfff9c5d06---93923344431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+brick+bronze+uncopylocked+8th+gymPDF 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
font_00_sfnt_off00033eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000356c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x356C1 25432 bytes
SHA-256: e4daadd2422631927fa995db4d1be79495448f12a22397974e06793dcfbf5ef9
font_02_sfnt_off00037d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37D4D 24692 bytes
SHA-256: 05cf03ed5d6a9c20da97e9238d50cf0d1b71a378df23428996acd6e498d15c9f
font_03_sfnt_off0003bb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB9D 11348 bytes
SHA-256: 05a5135ced7d5ecbc734d452eff133c69913dfc81bc0415c9ec2f34e80dc1e1e
font_04_sfnt_off0003d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D5C0 5428 bytes
SHA-256: 53052d5bdc2f168a62903116700ff04b18e54ea16d096981f8a4cab3b8ae9a68

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