Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6e4c3b144e33fd…

MALICIOUS

PDF

47.6 KB Created: 2021-06-14 02:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1a46b46539f7033d60826fa8708f1b7b SHA-1: 8ee04b4568ea5c899b22d377f2f852c9e3d7157e SHA-256: 0b6e4c3b144e33fd39fbf8b5c171c3e250a91c692ca9b9c50c3b1e3c9a90511e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks or free accounts, directing users to potentially malicious websites. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.co/app/431946152/free-account-roblox-obc-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-hack-aug-8-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-you-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-get-free-robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/jailbreak-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-roblox-jailbreak-774_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A03 28128 bytes
SHA-256: be31ba3b8ca20a69b7122579794817be317bf4ccb94d7a1315177df9f322271f
font_01_sfnt_off0000890e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000961f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961F 18780 bytes
SHA-256: 49e2f32f27884c4f0902719861625f5876dbc1e7cf35fae5886ba700f787745a

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