Malicious PDF — malware analysis report

Static analysis result for SHA-256 1309b3abda11eb7c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 06:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af29beb8daf77eb0a5f7546625954724 SHA-1: ddb96886df2b66823e1abe9b5f9013b8c9e6a2a0 SHA-256: 1309b3abda11eb7c95705bc4a2a5a030c7d4167df797c42cbb1d65b720a6428c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/479516143/how-to-get-a-free-minecraft-account-game-hack PDF link annotation
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/games-with-free-radio-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-no-human-verification-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/codigo-hack-para-robux-inspeccionar_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-scams-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mansamura.sch.id/__statics/gudangsoal/files/hack-robux-site-robloxcom_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_off00003217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3217 22564 bytes
SHA-256: c79e03abedabaffb78d190d9987cafddd3cf7360c32cb962aabb4afa7d2c5649
font_01_sfnt_off000062ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 18300 bytes
SHA-256: 42a02714a255c5483bbad6f3be0925a809022fd1c414ca09bcf2d9d784a4176f

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