Malicious PDF — malware analysis report

Static analysis result for SHA-256 c067a8d34584c250…

MALICIOUS

PDF

83.5 KB Created: 2021-09-16 23:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a39f1c79faed8adf6dc9dc00a6f78cfc SHA-1: cf9aed85d937a7163d5b4a10a0c36bd36f1b9610 SHA-256: c067a8d34584c2504553aa8bb4c237ca75a830913a1030eaa2a9264925dad156
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits characteristics of a phishing lure, including a visual download button and instructions for a password-protected archive, intended to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of numerous links to potentially compromised websites further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • 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 http://j-club.eu/userfiles/file/tuzuxixutavefi.pdf In PDF document text
    • http://rayanchem.com/d/files/xududigalowejibom.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/37c7d72d09ad58196181368818270377/tegunojozariniginitukusop.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0d8fc3863---4801968250.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/17853808882.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/44302058971.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/68526526200.pdfIn PDF document text
    • https://kvzriu.org/images/file/pekajumenakiwisobe.pdfIn PDF document text
    • https://polenhosting.com/calisma2/files/uploads/vewowakoxopajotalibaju.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cb1c45676a29c9184fac45c91eeb9e76/jezomokurubukujiz.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/62814271162.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/72858606039.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/wepixiwanevamulevisamivig.pdfIn PDF document text
    • https://visualarchive.bg/files/22163236138.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8f1285bc8---67239871431.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ciija5841c3affgtqohsa1ahlr/jeror.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16132cb80f405d---91604225293.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebeede7dfc---45765044080.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/31326294948.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/33218310324.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/zoxaxezolanezup.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/gijelomebabox.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/9ed707622612e4364ceea2a13ff48bcd/50227655834.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/futebus.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363c7913633---tepixog.pdfIn PDF document text
    • http://falerisztika.hu/tmp/rovaziraporoxibasaxepebul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=wifi+hacking+program+for+androidPDF 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_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 10708 bytes
SHA-256: 5c135fe68d9824c41a2e162d40cf5568a501aec49a763368e1cfa13563ebe41d
font_02_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 18192 bytes
SHA-256: 408e705b7e92886e928132d130fc0aa0882ff91d8e1c5526ff44be605b11fd05