Malicious PDF — malware analysis report

Static analysis result for SHA-256 a415af9a04f05820…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 00:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 89f7b5d0304edcb3fbd497267ed725ef SHA-1: 2c656c9235e3b4c4c2c6517abca7674e5edd7340 SHA-256: a415af9a04f058205cb02f632863dc741400663a335e58ac474bb6b25e2c28fc
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 0.9865

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.online/app/431946152/code-free-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/pokemon-go-free-gift-codes_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-match_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-survey_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
stream_004_off00004f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 24560 bytes
SHA-256: 3c3ffc38df7870868f0b6f4774aeb6ac3b776a0c5ed6da41bd43f564e964c070
font_01_sfnt_off000087ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AE 18188 bytes
SHA-256: 00280273b0975bee0187bf1a1cc0e29ac13cf800f2976c84d5f4ba53341fee41

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