Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa575b3224931c1…

MALICIOUS

PDF

86.7 KB Created: 2021-09-10 05:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: adad26f4b73d2568b64d95a71cb58877 SHA-1: 8ff5cbaa7e8177bc820ce22abbe2714f669d2263 SHA-256: 6fa575b3224931c1804d30511e3576e1cfddacef21e9cb23170baba04b79b387
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://hram-uspeniya.ru/ckfinder/userfiles/files/nalivawizefa.pdf In PDF document text
    • https://dom4m.com/userfiles/files/sipor.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/34882975024.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/leseri.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/84960711145.pdfIn PDF document text
    • http://tai-group.com/upload/files/vorerabor.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/20608186032.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/pegatedepujapivejavugizes.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/retan.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/zirigiraperowa.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/21599558658.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/jukexitexikibafajopa.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e60c984f7---wixorav.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/lazagiba.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/55661743244.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/pevuzofexoginubawake.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/55826055147.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///79686970059.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/82622360012.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/37657630560.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/96906389513.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/43060621938.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/pinejilopefawidelakumos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=photo+grid+apk+for+pcPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 10540 bytes
SHA-256: 24a3c2dc1a9514900b830bb1a9ad451162f7cbe0a1bf63f16049875666666fd7
font_02_sfnt_off00011787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11787 21124 bytes
SHA-256: 92d6cc5dd1ad47ebf33a036d06bba74ddb36198780a0ef0f1a17eb5abbc53fa5

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