Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b46e2f5e6205d27…

MALICIOUS

PDF

49.8 KB Created: 2021-05-17 10:43:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c67db26e927723ec4e00bef1bbe434d7 SHA-1: ea24576b9506f84c930d71263c92b01ece24d103 SHA-256: 0b46e2f5e6205d2730ed7e0f7538e41335d0c4a093903a43f6d568cf01442fc3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aimbot-download-roblox-game-hack PDF link annotation
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/robloxhacks_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/robux-best_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D16 25336 bytes
SHA-256: ed9af060a98132ecdc48a4e678ae594a93c28f7d2060351dc4863788ef9dc37e
font_01_sfnt_off0000869e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9084 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D96 19000 bytes
SHA-256: 7d611a1d50564430ff0519ba238feadb200c8b25cb84a0d6ab1661790e5ed700

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