Malicious PDF — malware analysis report

Static analysis result for SHA-256 0568015acb2e5f89…

MALICIOUS

PDF

117.6 KB Created: 2021-06-26 11:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fba658ae67b3e77c41e15b06da7d1f7 SHA-1: 62802354f8510e7ad9de4c6325d4a0c20261e757 SHA-256: 0568015acb2e5f89382e543c6fe818f0517c51251c9374255a8f80d12e278a87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/2io49akov9r8v097db7e2paup3/vikegipazopebogan.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abcb9068b8---burululudavubusexo.pdf
    • https://renebeumer.nl/userfiles/file/54807037701.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ed99878bf60dbac03282bb503423e8aa/sosurol.pdf
    • http://stensoproject.com/userfiles/files/gazomarasilafejojowa.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8fe8bdc1---wavuxowekimugenetu.pdf
    • https://tenekedjieva.com/uploads/file/8595894729.pdf
    • https://ecohort.com/userfiles/files/35465549035.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/2hbg03h3l3etifuq5jmuu21mop/40457161252.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ueucpl2uur8q9vu3o8p1j0n0r6/34127493665.pdf
    • http://sevimticaret.net/userfiles/file/71839460091.pdf
    • https://emprenderem.cl/files/tumonuzabedi.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090efd1c74dd---63115769142.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7f609d1ee7e3c9dfcd92570ea8a2b176/71009742703.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d2f59ca8e12687761c05c54816f33f86/77163032444.pdf
    • https://ahreco.com/uploads/news_file/pemukujotusofeno.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/58332943775.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/5pp8udtarthk3pej40341jo5h5/bosebeg.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f605ba7915b5616fa77704d696aa520f/nogupi.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/jovapo.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26aa21a1c0---kireruzugirabimax.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fc57cbdf526bd32beede5e11fb924b27/womotad.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/260bb2b822dc2df5d8aa1be475e464a8/73174355777.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/83fb32b0323f9d2b3730f59f822b1a4e/35398915296.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/mfngsi1j18r2cgtv13vk9jo5v6/77638109873.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=unity+animation+cycle+offset
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bc.bin
4a8d5d51c16aae1a935ca8f6ba3f6401acde50e57956a7588b363a496b1613f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 22764 bytes
font_01_sfnt_off0001298c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 16792 bytes
font_02_sfnt_off000141a3.bin
dd6196ac529c2057631090d30617977e44ca886793abc16571a8af69cdab374c
pdf-font-stream PDF embedded font (sfnt) at offset 0x141A3 10516 bytes
font_03_sfnt_off00015994.bin
5ea3fea324bc55a1f0c008e3931126fb0c824d49ee4bec20a2f1c3bb9e63b296
pdf-font-stream PDF embedded font (sfnt) at offset 0x15994 40124 bytes