Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbbaa745906480d…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 07:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9138eb1103f58f0b5bb63e678a3c23f7 SHA-1: d8410c50a2ccdbd536163cf0543a0be3ce210b57 SHA-256: 1bbbaa745906480daa15cc41933f145e4ed33aa8c6416653dd1dcf867db45c24
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack Tool'. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users with game-related cheats to download potentially harmful files or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/download-coin-master-hack-tool-v1-9-game-hack In PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/master-coin-free_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/how-to-get-free-robux-instantly_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_004_off00005378.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5378 30568 bytes
SHA-256: 362644b76753311e9447bc3a2984123f234c240df402a1264d233884a34bc2db
font_01_sfnt_off000091f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F8 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE3 18700 bytes
SHA-256: d3737c6cf9fd63f63d0fb032ca99fcdeafd417f1b9a8644db5f60105982db781

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