Malicious PDF — malware analysis report

Static analysis result for SHA-256 a549884aae70d5cc…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 02:40:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 86464e4240becc652c07254cd0fb451a SHA-1: 31043cfb5ee450dffb903df2a71ff676a4b0ee2b SHA-256: a549884aae70d5cc978242f2cc10ad9193aef7cf061f52ac4938960457501263
122 Risk Score

Malware Insights

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

The PDF contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body, though heavily obfuscated, also contains references to game hacks and a URL that aligns with this lure. This suggests a social engineering attack aimed at tricking users into visiting a malicious site, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/rbx-land-free-robux-game-hack PDF link annotation
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/robux-scam_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 27100 bytes
SHA-256: 94fbfbdb8f79a762913dd4451852578e678148bbad9143e3237e6d9278f37544
font_01_sfnt_off000087f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 18416 bytes
SHA-256: ed1846d837a30ccb27e25bdb955d82aabb746909bdcfb120b1e9cc4e6290fa01

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