Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee99b010eedcb3ed…

MALICIOUS

PDF

82.5 KB Created: 2021-07-02 07:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c1293fd5c0439933cfde779e1b0a353c SHA-1: b7fe2b986a206b5bd7543610df88c40a12aacce1 SHA-256: ee99b010eedcb3ede257a82cbaf03cdb451f900414ee5cca134ce959ce8ca057
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://laborke.ru/uplcv?utm_term=college+physics+9th+edition+hugh+d+young PDF link annotation
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160800e9a17d5e---50442637794.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/xujalajexodof.pdfIn PDF document text
    • https://campermagazine.tv/public/file/wibamozomisutirugovawugux.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/7npumcedgksivsie3r93vjqi77/57284855570.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/pawapizuraxam.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/c56d40a66db7b28d2b4f17e3e2d62bd8/51307775165.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/vaweveku.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/27c2c96bac32f8b2adfd3a4581353126/56120832920.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/14459728693.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/jirowawudib.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb30e5255b8---37542463417.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fb14789c8---zuwudeboka.pdfIn PDF document text
    • http://malifer.hu/upload/file/padokuked.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce8689cf27---22076693240.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/6da4332c8f2228655005a10defc54500/pikudetozi.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/mt0tff80p6m7t90vcf31u1oi3q/16356546762.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3f8eb7fceade3fb42b77dd4163e85b8c/netoxetunuluvigo.pdfIn PDF document text
    • https://dptech.vn/uploads/files/samuzefefaji.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kodejimosivujuvanir.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/wisaxobajobinotipexarup.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nurosimuzumo.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8d41a0cda44f92a15b208d8304c8c0a2/kukonilizademab.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/tetenop.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609033c06894d---vosesabunebinom.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/914j7grtd3p82q84r92np8ipud/37898529094.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 18140 bytes
SHA-256: 0e6884b411a047f15f10fa5b293b7d9da30676dfda852c898169b66e970195f0
font_02_sfnt_off0001235f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235F 10944 bytes
SHA-256: 7b14cd1249cb19f835716104f5e5f070f5212ae8da71efb4c54c0966998891d4

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