Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8da0da5cf8ff567…

MALICIOUS

PDF

75.2 KB Created: 2021-02-12 19:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fd95f8b4c4f376b240ec0cd492539b3 SHA-1: 9486dc6ec145aea106b4c912133cdea4c3cf42d6 SHA-256: c8da0da5cf8ff567facbd00d06a958191d6312c7c2e0a9aa19ed38e2c95f0c85
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=davinci+resolve+15+manual+espa%25C3%25B1ol+pdf PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/4YhbghR/phoenix_force_pro_scooter_black_neon.pdfIn PDF document text
    • http://tramlaweq.online/397928326612b794.pdfIn PDF document text
    • http://sijowusim.22web.org/play_store_app_android_version.pdfIn PDF document text
    • https://pojejuxafofivev.weebly.com/uploads/1/3/1/3/131398022/tenojabeza.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/patojop.pdfIn PDF document text
    • http://you-bestshop.xyz/79341086104zsike.pdfIn PDF document text
    • https://tekigeja.weebly.com/uploads/1/3/1/3/131384442/96d2ece43d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_601aefb42dee4.pdfIn PDF document text
    • http://shopyou.online/34831241510mxpw3.pdfIn PDF document text
    • http://rokexulom.22web.org/relative_pronoun_worksheet_for_class_5.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuniruf/Vmkjbha/mustang_super_snake_price_south_africa.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/xibazanezi-wokajilowofove-bisiruv-ragusavedir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kirawolus.rf.gd/37939707364.pdfIn PDF document text
    • http://pamakejexo.epizy.com/50087678389.pdfIn PDF document text
    • http://sixobujogek.rf.gd/sql_server_2008_developer_edition.pdfIn PDF document text
    • http://retelowanudugut.epizy.com/38706579418.pdfIn PDF document text
    • http://jizagedades.rf.gd/call_of_duty_ghosts_code.pdfIn PDF document text
    • http://zuniguvip.epizy.com/ubiquiti_unifi_uap_ac_lr_software.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5748 bytes
SHA-256: 695dcb7356477e29666138773fc5317a4a4d598d5ef50bd59e4fe272dcbd37c9
font_01_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 10652 bytes
SHA-256: 513edc419e09a9417dc7fd0afb6908aa0ce7f3c73065f3d11618a9c99a10ec0e

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