Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6def2fcf7f68a34…

MALICIOUS

PDF

80.0 KB Created: 2021-09-23 15:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 76fdebf80b0eae228e3c98e85cf97dad SHA-1: 6242e1a0e0696d491f703475f7c8545f0ee1d504 SHA-256: c6def2fcf7f68a34bb02fc0c8bf5ea59a8b465a12a04122d792a3234ccf22af2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to trick users into downloading further malicious content. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely provides instructions to decrypt or access a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ketchas.ru/uplcv?utm_term=watch+one+punch+man+season+2 PDF link annotation
    • http://everbeenmagnet.com/js/upfiles/files/xolevepuraxutapini.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613018bf424be---vawuderalenajafures.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7737eee2d---kugijipulivime.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146740773f79---sezamij.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/sugiguvusalekukemupud.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/lufupimuwezaxopav.pdfIn PDF document text
    • http://kmsenior.org/file/files/nerarodezuwaxujibekoto.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rukukit.pdfIn PDF document text
    • http://machin.kr/userData/board/file/gofexepuwaterisogufilapi.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613234f414c0f---vuzovanekobifa.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/78295847566.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/verigixeg.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132221d1cdd8---45732031179.pdfIn PDF document text
    • http://ccshecea.org/upload/files/kunojevufodaj.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091916513673499.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/zadebatetonezewedijojeg.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/dukefogewajukok.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/vubekenafef.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8c274762---widajitilo.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/9309180521.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/78671431023.pdfIn PDF document text
    • http://ekouklid.eu/UserFiles/file/rozagirududojub.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_off0000d3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 10612 bytes
SHA-256: b84c55f1966b6c912fc45376f3253c3c9679dd9b5f237272359f067f7e449fcf
font_01_sfnt_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 18300 bytes
SHA-256: 4d273d89dad0a5349dd8817167b0ae726da45b0c98a45bb3ebaeb6250610847e
font_02_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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