Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2a65ec01563395…

MALICIOUS

PDF

90.9 KB Created: 2021-09-22 13:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3b7f76da9955ab7ea33ed3c16e7847c7 SHA-1: d00394c88584d52ede159e64675340e767bbba22 SHA-256: 6c2a65ec015633959d827886a144a2ab826f0c8ad49fd1073e90eea3bcf5b8f2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, indicated by the presence of a link farm on disposable hosting and a high ML classifier score. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document's intent is to trick the user into downloading a password-protected archive, which is a common tactic to bypass gateway security. Embedded JavaScript streams are also present, likely used to facilitate the download or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161462c1ca686f---modokerafimujutewigesoda.pdf In PDF document text
    • http://redigonda.it/userfiles/files/gupuse.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/91989199437.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/11456005763.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/kasegupaverif.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worawedafitanemewor.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/22360920017.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b844ce03a---kopuxoxetili.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1520d4296---sanelojipoxinukubuz.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6664027b0018eeece16c151a7a6c7f91/nejesizozasexedizag.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/vanuwuzibabusakow.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/93090165190.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/91999115312.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161345c8cc8a6a---60667969548.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/37555246235.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/4314999586.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/86244138319.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/kobawifunipafisut.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/dujipabupepigemo.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/27899561693.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/sotodinabi.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/jojafukimakojaz.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-21/20210921121617815574.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/29709405409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=macbook+pro+stuck+on+spinning+wheelPDF 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_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 18496 bytes
SHA-256: cf2c54de0b0b2542f527bf78719e0856fc1860462487576997c877f547fe7804
font_01_sfnt_off00012c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8C 11064 bytes
SHA-256: c749ebcbf9bbae708171678b75c304ac8c98be417e8711af05e5cb7b91727da8
font_02_sfnt_off0001462f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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