Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bb4ad72fddadeb…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 20:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 605909df138fab5c8d8471801e6a6c45 SHA-1: 7540314e7058cf84853b47d0b20bd1ffd40a637f SHA-256: f5bb4ad72fddadeb87561faa555d97cf97d69ff2f3b0572e687917480a8a8b38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically luring users with game hack content. The document body, though heavily obfuscated, contains references to 'Coin Master Cheats' and a URL that aligns with the heuristic findings. The presence of multiple embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a phishing or social engineering attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-cheats-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/tiktok-for-free-download_GM835599320.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/pokemon-go-free-12-km-eggs_GM1094591345.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-2021_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_004_off00005078.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5078 25400 bytes
SHA-256: fffec331b44bc57eccc0c70ac069e15f7bb42f8260c3248a0f6f546dde8dd35f
font_01_sfnt_off00008a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A72 17712 bytes
SHA-256: 0cf37999a32b0b26e6dcf722a916a3c4a254350d50e55584564eaaa0ec63890c

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