Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e016a96fb17103…

MALICIOUS

PDF

248.4 KB Created: 2021-08-23 16:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 58c585e06a575fed3f49265bfd7470fc SHA-1: 5fcdc3f3628bd667dc0b73f65b0ce16df001016b SHA-256: c2e016a96fb17103bd22eb1489be9332f91c8e7a9ae81b5d542f44d4b7097705
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8337

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.
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/7d84cd79aa11431146846e9a1bab823f/dupugubekose.pdf In PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/paxulimen.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/75223131571.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/70630424902.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/7e1b62c2d55c0f1afdf686c7493031e8/suxedibawipozobefijired.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/8102938577.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fbsdg3g1m4klksd82vl3nfpv30/rekubekezuxisob.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/ledipojitalatufelu.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/tewaxagajivef.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1628700684.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c6fe231a4---sevezukewinabelul.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/29c9d9d6tfst77s47sn02picnr/zoxadijukoz.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/71889881882.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607105ec9b71d---26875190318.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/r02d9cokpin15i3t9kvdrdg71q/69619977516.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/bf42de99bc81be9cf8687127bec7d0ed/17385066651.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e20e3db00c---venabomaxutigamifara.pdfIn PDF document text
    • https://digireg.se/upload/forenomiludegulemukasanix.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/229065a35dfdf0b7de6820c005bee2c1/woxuxavoxa.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/kaxarifoxo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d1b462d0044baf3cd13888259992ff16/zovig.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/df03675610a4fb84b678c562f6079394/tokori.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607208931b4b3---63842873271.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/biviligukugoxazosok.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/77865812473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=congenital+deafness+refers+to+deafnessPDF 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_off00036bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36BEA 21524 bytes
SHA-256: 80306fe8cb8950b248c26f8aab5f45f30a30e922af48aa02a1f5b396cf45bfdf
font_01_sfnt_off0003a202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A202 10560 bytes
SHA-256: 4d4a66e5eba94863190d3c67a0998af4ff8326642b7a3a69ad075a96dcfaccb5
font_02_sfnt_off0003ba10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1