Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9a0744550dd21a…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 22:01:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a9eb18d8cd2cb3f588eac6b495388a48 SHA-1: 4e6b0a642f2c80201e07721eeb3f2e50fc7c13f4 SHA-256: 2c9a0744550dd21a2cc04ba13192308d86094e68f2a71fcc2f194ab8a2f099a4
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 0.9971

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-for-robux-game-hack PDF link annotation
    • http://library.darmaagung.ac.id//repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-70-spin-link-today_GM406889139.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
stream_003_off000049f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F9 25020 bytes
SHA-256: 60ad66b64fab406e4fd5fb421cf3af561b9334503f5be597ac35e80b5edf1228
font_01_sfnt_off0000835b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 18648 bytes
SHA-256: 7689b6731d47fc176aef925fc5194a10a34d162e90d7014a3ccea13949bcaf7e

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