Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c26773f910280de…

MALICIOUS

PDF

88.8 KB Created: 2021-08-29 11:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 49b79ec96477c35b73a64666a4ad107a SHA-1: 927f615a510a9ad48809744274fa1432fa2056b6 SHA-256: 0c26773f910280dece40dc5ad7bbd668c71c9e6f9c1dabd978d1167a9aba43a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160710108a0a49---45815055108.pdf In PDF document text
    • http://maility.pl/_ADRESuserfiles/file/42441098747.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/58444257179.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161116b0e35a35---9663557434.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/1205751280.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f02c35c394a0bab6f6e3e36b65a1e6e8/gobad.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d10961a01b---mubivebilo.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f7fcbb179291e7c3f2fcfab6bf2e8454/80456660369.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/soluxawupazefovotatud.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/e3c08df08df6623907a05c9e9e053acd/86416980540.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/68727668391.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/92797754903.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16107925fc8728---37657029862.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9e43d2642678c3bb425e13b94a854e17/lokini.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39bf4ecba---nenijanateboxadutu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/d55e786d4dd748b058570c8ddde5b7b5/84181132602.pdfIn PDF document text
    • http://360global.ca/userfiles/file/25582916479.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-6/20210506225339752064.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/29090543410.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/rupolidovovijetoso.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/k2e1rjlvnp25u58gf1r9816uh3/kixilokebisajobawirotil.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/tarowojopojusugiraxedolir.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/39156573633.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/45408942724.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/32340707583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=whoop+there+isPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 18732 bytes
SHA-256: 49d91b748779d7fa69f5d7d4a9a08b133d89bca442c79ad4ff73bc4be5a00c36
font_01_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 10028 bytes
SHA-256: feeae3ec2d28cd08a00cf1776956ae9a5e3f5323fabc881b68e38ae824c68663
font_02_sfnt_off00013d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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