Malicious PDF — malware analysis report

Static analysis result for SHA-256 380381bb65c9125d…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 14:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 00838cda2da426139b5992d32e857fad SHA-1: e6f2678dae5850db53037f6d76ad9adf3afc9706 SHA-256: 380381bb65c9125dc3fa68ecd3812cb16dca9f2ca3552389deb7d4e60b4a1d97
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to facilitate further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • 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 https://agmatbaa.com/upload/files/lanujabexiturixa.pdf In PDF document text
    • https://albawadiroad.com/userfiles/files/kefabe.pdfIn PDF document text
    • http://tion.hu/upload/file/woxonilaxi.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/40182446969.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607251d5d52a4---8541899779.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094d558232b7---suvenit.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/10669590588.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/6dd0c2e49ee9bea137d333ffc26556e6/xokokojomize.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097b1e67f8c8---tomiwofasizeguzasejega.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/14991118226.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/46031617543.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/vupuwebagojibodilap.pdfIn PDF document text
    • http://elitvorota.ru/f/file/kevufijev.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab42b971e4---73844717397.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e8a8ffb8---12228555460.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/76717151478.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/41041877041.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/jopikolekowunuxegapawipux.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/50159979367.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/cnriscjl5inc3v5fgqugbfhhco/83870948472.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d0ebc7eaa---penugovonafu.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/13324319902.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210718104132_xwgbl9.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/pumojotedelenirevonep.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/51364175852.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/jafopiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=como+cortar+pagina+pdf+onlinePDF 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_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 18900 bytes
SHA-256: ba5ad0a4820688159ceae2f6d535007951fbb8495f2be1a33e32a4c1f072f5fe
font_01_sfnt_off000116f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 10824 bytes
SHA-256: 20534d02966c7f963e9ad33f068be80344ea4a24540ce0174860859c511ede8e
font_02_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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