Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac4200f84ba2dc5…

MALICIOUS

PDF

76.8 KB Created: 2021-07-08 08:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 401c2de5c983c3dbb1a615e8c6522aab SHA-1: 6b4ffad61bc25470760a444d00b37a7845b6fe9b SHA-256: eac4200f84ba2dc52799e5f17ace6b24597fc65b7bee2809d0020522ff68ec9b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicate a link farm designed to redirect users to malicious sites. The primary purpose appears to be phishing or distributing further malware through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=the+potential+energy+of+a+certain+spring PDF link annotation
    • https://p1gtac.com/uploader/files/25871520382.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9d2f4b3713afef2fae0a779e7d687250/xisanume.pdfIn PDF document text
    • http://yilip.net/userData/board/file/44747047231.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/47133271559.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210706034941951.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/39618532567.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/serixejutupagewuguj.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ce5364772c21c818554a4b20d921a597/77644450395.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429140600163597.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d232e62e71---fovavetozerosupeduwovo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6l0qabe7sbehim29svob86uhm5/jerifubuwopore.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/fq4fa2lhlvdk1q9esnhkimjqn4/xuneviladugofuzixiga.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/sodixezulamovugiji.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/21003425054.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f62425ca---fimewenikasagatulabugidab.pdfIn PDF document text
    • http://ailizia.com/userfiles/volegijewox.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/43297399220.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ra05fpm2c1ga4n1amut72qtuoj/bonupufe.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/rp3v3bqul5ckj1kesnpv0fhn70/zulelezomid.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/bolewitawabefafudiv.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c53b2d935---97129826466.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/bigilifapulave.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d1b4c0f5f1d81780a8aab0c2acc683ad/29680689987.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b07cc0b2c66---21854678318.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54A 17912 bytes
SHA-256: 0627d76cf5dd94a15f226f897a5cb6d6120c3afcd24724db6d0bc2c932922c7b
font_01_sfnt_off0000f422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF422 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 10836 bytes
SHA-256: 6ac47d3669fdfdb3e04e89ded401253271ab045915067470b0d786d077493a12

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