Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd903e653808780…

MALICIOUS

PDF

76.0 KB Created: 2021-09-01 18:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f32d854af065fda204ceb75e15cf31c SHA-1: b66073dc8d422aec3549610827518c91c9b42292 SHA-256: edd903e653808780178bff190d0845923966c37f94e86864aa4146ec6711d486
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly 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 0.9985

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://irlanc.ru/uplcv?utm_term=pious+meaning+in+english PDF link annotation
    • http://kapfenberger-schuetzenverein.at/userfiles/file/8403492496.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/12183332640.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/363681631.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/447q9lmcbropvae9g6vh7udvkg/fuwogimuwigixato.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/87f7914692e55f6acede11573cea2301/93604094030.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a138d504a90f821393bfcb86abdfd439/liwanavimufawon.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/tarisizuj.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/somowobeneg.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/pegagenogigimetazi.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/xaxawuguzuxorawa.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vc79tl5pec0gdnhbcsbcef8l92/duburazegogeg.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/52925401645.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/tuvugevaveruxenu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607247ba0eb99---robitibuxodurireboxim.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/sosavuwodozowaveso.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/42274690495.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/da7c1dd4fa5722811c83c7ea08cc7f30/43402780072.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611253a57fb6d---80279603029.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/8ju48qv7korvcd52th0jcce0jt/32612893572.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21arcr81j130dej78dnie94ni7/57056941145.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/jemol.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/kewutufikuf.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/2130489617.pdfIn PDF document text
    • http://guowangcable.com/d/files/telasupagabefakixu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812fb972c0b---lerofavomuxonojasikana.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF8 18016 bytes
SHA-256: e366d2e2d626e1d25e60f7f0811376e77904a30e87035d78dd189ad34c5d0ba2
font_01_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 10460 bytes
SHA-256: af019e8c27cd3bceaddc3fb8cb9f95948799ce07e2e5d981e3d3d5e33e997c98
font_02_sfnt_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_03_sfnt_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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