Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42628f6aa54d942…

MALICIOUS

PDF

90.9 KB Created: 2021-07-20 03:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2b62b2a06733dc8eea6c9f03d1d77175 SHA-1: 05616a7f06d8d1823d1bce845ef24c0a3d53c0c0 SHA-256: e42628f6aa54d94211e3f8a9a869cbe6b6710d138b8b0bae2c6f4d74692e6e90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://zkojicin.cz/userfiles/file/wexulosubanip.pdf In PDF document text
    • http://linuxnewyork.com/draft/media//56939447072.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/38821153057.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/matokavaju.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/bowesatojapabizig.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/07d1a77983947c66a38a996d841f43d3/26318867716.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/parixuzadu.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/kurivafetema.pdfIn PDF document text
    • http://cosyromania.com/media/file/wibobofebafoposove.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/24235245323.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/74697592910.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/sejeligekitixema.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kerokiwaboxaludul.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72eb1cbd9f---12852538763.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/78725623470.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c01eca79f32---29940788852.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/81341b4351946beb94c9a6f463282b8d/nibexuxuja.pdfIn PDF document text
    • http://lokale-uzytkowe.pl/uploades/fckeditorfile/51901762912.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/bupujupikujiri.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/80743864184.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/wesiwofijipi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b4qcvb2oknrvq5lo5qnjaqjkp4/nosoga.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/mjnp9hrpr6f5dbn28m0peasm86/tonosexorofofetadugaw.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d01a7011fe---86200307476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=4+year+old+clearing+throat+all+the+timePDF 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_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001180c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 10744 bytes
SHA-256: 9deea409d52ffcbd72c40111fe5906f20d74bf52c71c2efff1ed09471e0b444d
font_02_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 17852 bytes
SHA-256: 54916930f2349a18e8803ee423414cff133c38ca901e7c76fdf5148db11fbbcb

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