Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6eb99424e53c611…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 10:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8f9ca507bed267746279c81e8f210355 SHA-1: 749c73056923b2b630c06a4e51517df1ccecd6e2 SHA-256: e6eb99424e53c61183f2173e0b3a32854e239f851d658404834baa5e2333d8ce
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable, limiting the analysis to the link farm behavior.

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 http://silesiacapital.eu/data/file/94245962958.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/bfn65023k9ke1egij66ijmp68p/managolewisosozipunoni.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/9ed736bad424cbbbcf8fb321ea39a4a1/16732888681.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02229b8ec---lulajulot.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/zosogafemebakezumetinumo.pdfIn PDF document text
    • https://rajaunited.com/contents//files/74439408720.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b678767894---60127337394.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/3492956132.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/38pdta47lvk90pqbk8cft3lh88/nedozemikuno.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/74012185281.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/553b7665a6320113898a6fd7df455d25/92131835688.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/zigebibazabafarozubuvigi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6f528362---80536413969.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/jkea0h0s250q2r51l3cnktkcl0/30649439149.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/h4cj9d3m88vgftci5il6njuqq1/33320914671.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8479e1f62---vavume.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/netepumomudigal.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/buxofamuvuw.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca8c73d3a04---31872301661.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/3e4dfa061523915df506327be59a8ec5/danupom.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/fufenigibozifeve.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f52c92236---63379204645.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/cfiq0b4mhn1v6oe3mm3sd66qrr/76227874651.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/95878938883.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/26002361945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=legal+writing+and+drafting+pdfPDF 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_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 17060 bytes
SHA-256: 1ec3158d3a62512d59297878cdca23492db590ce61f66b76b0da7bea173716d1
font_01_sfnt_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 10428 bytes
SHA-256: 49f41d2bc3019e6e71d952b4b1177db0b6ef43ceb4cc5187ed7e60d7bba8bfd7
font_02_sfnt_off00012ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1