Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8e97bdf191dfd2…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 07:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ac546cb1a343d3a40fadffd0ade68b2f SHA-1: 0fcd7693dff33a01f91662c87cb46b2e103477d5 SHA-256: 9f8e97bdf191dfd279a6076c24f616fa95c4d91b8a064431a2be85c8e1c942e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'free Robux' and game hacks, which is a common tactic for phishing and malware distribution. It embeds a URL that points to a known malicious redirector, designed to lead users to potentially harmful content or further malware downloads. 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.co/app/431946152/free-robux-live-2021-game-hack In PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/tiktok-free-fans-video_GM835599320.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-link_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/natevang-free-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/hacks-master-keys-dungeon-shooter-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-hack-tool-apk-download_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021-may_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/can-people-actually-hack-into-a-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_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
font_00_sfnt_off0000319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319A 21700 bytes
SHA-256: 0d062bd234cbc2ba9e7234622b9aca50badddd1734c55da1974e5a812c053485
font_01_sfnt_off00006165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6165 19352 bytes
SHA-256: 3a3533b48cd06330159b3f4c28a86be959f914c8db8c1f16cebfe779ec56178d

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