Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bf9c7f2d60addf…

MALICIOUS

PDF

51.2 KB Created: 2021-05-11 14:06:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 71f1c5a7f5e9f4b118e90b3caaff978d SHA-1: 49f81bf9cb00419853745230641ae94696d6b49d SHA-256: 70bf9c7f2d60addf4ef4fbceb6d17bcb215ad45662ec91a284620ff7d2364604
200 Risk Score

Malware Insights

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

The PDF contains multiple links to what is identified as a malicious redirector, disguised as a generator for game hacks and free in-game currency. The document body and heuristics indicate a social engineering lure, specifically a browser extension installation lure, to trick the user into clicking the malicious link. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-free-clothes-generator-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/431946152/roblox-free-clothes-generator-game-hack In PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/coin-game_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/www-robux_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/real-working-coin-master-hack_GM406889139.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
stream_003_off00004ffd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFD 26960 bytes
SHA-256: 5739c69f4d0796b395f7a62d875132bb64e1a224377f1cd1f468ae7e4c10d7b3
font_01_sfnt_off00008e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000097f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F6 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA508 18448 bytes
SHA-256: afe4d80e9b307905d1b46577691458e01dbb921fe666fe9998ea064ff4a1b434