Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca6a035fcf298cf…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 00:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0b412484db06ba39bd2984354b666066 SHA-1: 4387383b68a9bb7882182d162434758bee103af8 SHA-256: 0ca6a035fcf298cf5c6e8bf0156bb9b241599474c696ba7b0c34484d2cd59ded
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free in-game currency to entice users. It contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-hack-mod-apk-android-1-game-hack. The presence of a visual download button further supports the malicious intent of directing users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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 http://netcdn.tw/app/406889139/coin-master-hack-mod-apk-android-1-game-hack In PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/5-million-robux-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/daniel-newhard-youtube-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-roblox-by-inspect-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/hackear-el-roblox-med-city-noma_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/bloxburg-roblox-how-to-get-multiple-floor-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak-pc_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-fast-money-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-get-free-passes-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-do-you-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/roblox-command-cheats_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
stream_002_off000034d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D6 23328 bytes
SHA-256: 03d3426a2a0bb7b57fcf6174ccfbe7b6fdaa2b2e55432db64ae8f4439dec46e1
font_01_sfnt_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 18460 bytes
SHA-256: 3be7232d2d55ad1df906fc86075e5c59a8ef75c33394eb75378c4c29d382567b

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