Malicious PDF — malware analysis report

Static analysis result for SHA-256 0834a33f31085364…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 08:27:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cc59535193abdfb94d824479cf837a3e SHA-1: 57ba80ed536b963b0d21af16c979e3572a959aea SHA-256: 0834a33f31085364388d9f71935e9d6f24a6d57079464e6e58998d13b7b1d81a
160 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body confirms this lure by including the URL and related text. This indicates an attempt to trick the user into visiting a malicious site, likely to download further malware or exploit a vulnerability.

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.tw/app/479516143/how-can-i-play-minecraft-for-free-game-hack In PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-do-yoy-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-robux-gift-card-giveawa_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/giving-away-free-roblox-account-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnkarawang.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-roblox_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_off000030fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FC 21728 bytes
SHA-256: 8465fe3799fffd6ca232bb241ab23619750e9c4681495e19d0e166a82ed22784
font_01_sfnt_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 18568 bytes
SHA-256: ed4aa387c313cd04cdf9fee16f9ce185c935807b6124fbbf87cd3adc6a594d73

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