Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb064802420d3369…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 12:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1907a2a559c35ed5b81e65a57d71971d SHA-1: cb7983420a4847684df5b10ea4dc9f7ecfecdeff SHA-256: eb064802420d3369e886a9c591bb5e2e3b73fc737767d4fcc09ef0a3ebcc4053
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing an image-based interface with numerous external links. The embedded JavaScript stream and the high ML classifier score indicate malicious intent, likely to redirect users to malicious sites or prompt downloads. The document's structure and the presence of multiple links to compromised CMS uploads and disposable hosting further support its role as a phishing tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mevlanaasm.com/resimler/files/rolaxawa.pdf In PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/97153401903.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/22072071418.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e836ba0f46---4619055787.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614acf023d93b---fagosinubisivezisezimo.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149e29fbdc43---lokitegu.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419ce9c7423---85238227057.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/kekatuzaluvidakuwi.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384fbd86cb8---65679808012.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/gozoxogamusi.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/12906370215.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/mijenasejuzileti.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210915220934.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/9250983395.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/depururovanunitugogegul.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/kepazatet.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109070635247219.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/72464830666.pdfIn PDF document text
    • https://loyd.rs/images/file/23632285123.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/denevoni.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377ed0ba17d---58541708449.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161411b5e87800---pivigevufumokusobisot.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/kusiwujevutumaziwenukiro.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/webixaniwuzixolabotupowa.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/siwana.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/797703d59dd15f37c17da3025391a102/viramili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=rope+hero+mod+appPDF 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_off0000b1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FA 13912 bytes
SHA-256: eac869bc483cb9433c31ec12187b36ad3916b6a4ea1a74b5cdb0d57a0beb3843
font_01_sfnt_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 10192 bytes
SHA-256: a67a981d2f4314ac8dec6fbb102a0516d36bd516826b25dee1adf1eb58a5b250
font_02_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1