Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b4c2d570a649a5…

MALICIOUS

PDF

78.4 KB Created: 2021-02-24 10:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 783368d9a53a32f254d2e423dc314604 SHA-1: f653ff16911c04de12a1306f8dfddb447046b7e9 SHA-256: 05b4c2d570a649a5b14198a71814884b1bb83806ac8e76294d9f1994e627f2fb
182 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and impersonates a cloud document lure, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a downloader or phishing campaign, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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
  • 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://crophysi.ru/wix?keyword=pathoma+pdf+google+drive In PDF document text
    • http://bonapimum.iblogger.org/fixusurubepuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_602361f825e43.pdfIn PDF document text
    • http://kibipasadas.iblogger.org/cartagena_turismo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fce924db2b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_602b0a8a41858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5fff744ea5676.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/chicken_invaders_4_thanksgiving_edition_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/mofikafun.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/arimidex_package_insert.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/tajeruzunis.pdfIn PDF document text
    • http://dunupilopun.epizy.com/armin_transforms_into_colossal_titan.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/pelokelupalumolut.pdfIn PDF document text
    • http://memajale.epizy.com/58887013725.pdfIn PDF document text
    • http://rifukaleriduji.rf.gd/55583409358.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/special_26_movie_all_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bull_shoals_ar_fishing_guide.pdfIn PDF document text
    • http://safubifulaxoxe.rf.gd/ces_2019_tech_trends.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/best_nes_emulator_android_2019.pdfIn PDF document text
    • http://jirufemen.epizy.com/mass_effect_andromeda_romance_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/jekeweritubek.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_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 5340 bytes
SHA-256: e42093c327cea12d599b90d4bdb5642056c7bec4e8b4c62457917d10c38e9d52
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 10368 bytes
SHA-256: 80f11dc045c5a54ad2756cb0a6804be1411ed96ab1e3fdaea264febab23f3c4b

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