Malicious PDF — malware analysis report

Static analysis result for SHA-256 776fb8b7ace30014…

MALICIOUS

PDF

99.9 KB Created: 2021-06-30 10:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0e3dc56cc6991a947add3bee41dc4c11 SHA-1: 96ed641a616babca42c88f56d0b9ec2524e514a1 SHA-256: 776fb8b7ace30014db0d2a5164480b78e3d429aff985e08618f5178e71637b1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/747455528c59864053b7bdfc6b5fdd9e/satanalazunuk.pdf In PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160777386cbf75---fujalax.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160837eb586f89---68591609561.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/052aed75ce71290701291295d418d987/poxuvimubome.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/4b34330806de7d7470d7c75587cbcfbe/31032220823.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3fb4e5f92d6097d594c874f4e38ff9c9/9834336624.pdfIn PDF document text
    • http://sns.hu/_user/file/dinitajegen.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce65a49ab4---76904146578.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/peretikanimaliluse.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/ginavip.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085279d7b87a---banude.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/majeve.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923c688cfd5---rajobesagigugofopores.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/21046381894.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee98aec5d5---91282070856.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/697b028da4d3ce2706bc4b06b33f8e4f/31994343113.pdfIn PDF document text
    • https://turbooto.vn/upload/files/rewubukesalijewi.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/cl0tkeds7bhdp6vho382ioe9c7/navamazuduja.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h7qaanlk9j29j7uu7lbjn929f6/forivivafoboxunusape.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2d0ace0c6faf1da24bd9a8fac214b372/varonedivodekobemoku.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4a2ec622fbb0e96f7b26524b7ea5e041/winepewosoligixuzimu.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e75263828382c11119d66011cb6f10b8/60815954463.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/kudopebidavalajazusos.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/02ecdbd7185a6817cf88cc50393778e4/16080948388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=rise+of+nations+gold+edition+free+downloadPDF 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
stream_002_off0000edcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEDCF 27932 bytes
SHA-256: 16269de252fa6f01dca2d9fea6876fc9a9ab6b8bd673495e72058b02948d8357
font_01_sfnt_off00011fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAB 17900 bytes
SHA-256: 59ab91f90fd6f9d42fc01026f8189ea68006fa3bdd9951d19d5bdf883db0fbd9
font_02_sfnt_off00014f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F17 10660 bytes
SHA-256: ce135e13329d526189aa0e315ca650006a75179c1d8dc42399b7daa8f02f2c13
font_03_sfnt_off0001677d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1677D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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