Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e6567de4275ac6…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 18:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 606a3ec7c4ddcf419a8ccd1258f8dd3d SHA-1: 87c2a992d987996ea6d2e04ab13cdbda3c0d7f24 SHA-256: b3e6567de4275ac62ce126489d6dfc51243daec471d4849cdf3ec9bfbae0928c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to lead the user to a compromised or malicious site. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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
  • 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://netcdn.xyz/app/431946152/free-robux-codes-no-verification-game-hack In PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-system_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEC 27976 bytes
SHA-256: e748f633f9051555cd3e96bb82a01fe3248252fca0ce38389de1e8ce5b7eae5f
font_01_sfnt_off00008aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEF 18776 bytes
SHA-256: 1501cc25bcf8c3b3bf9df14f68216c1cc39cc5b0131e4343b63bafa21afb9c06

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