Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a146c5f8a819bc…

MALICIOUS

PDF

45.5 KB Created: 2021-05-12 10:05:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e0a946439dfbadfe5645c40af4804a95 SHA-1: d7c0af397b696594ff8a0812e462ffa071fbc6f1 SHA-256: 16a146c5f8a819bc2b949c7df9d993198400a1cfd8932128e825237a2977f748
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 https://netcdn.xyz/app/431946152/robux-offers-game-hack PDF link annotation
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn7agam.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-root_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_off00004a28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A28 32528 bytes
SHA-256: 0abf9ca504c90df88b54e1b45d1c0d55a3b94ee9e59925d68420dd6b2090bd96
font_01_sfnt_off0000911e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911E 17852 bytes
SHA-256: d996fede43d0fc1a5403a574ed382013adeb188792274686644c4f79c5d24ca5

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