Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f23c4e656a91445…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 17:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 59a1869ebdedb8a8fea072c1d2a030ed SHA-1: c0bdb7f1358a2f924d3a30095818f176776b07c9 SHA-256: 9f23c4e656a914451809049734fd335bafb7c2051a6cd643a1acf3fbe933c9e0
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-earn-free-robux-game-hack PDF link annotation
    • http://torkelson.se/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://torkelson.se/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://torkelson.se/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://torkelson.se/images/chisel-and-bits-mod-minecraft-pe_GM479516143.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_off000043ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43EF 26680 bytes
SHA-256: 63c66c55b356c25526395f49b95a96f664ae9869446ca99ac958aa712e9fa23a
font_01_sfnt_off0000805e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805E 18404 bytes
SHA-256: 14292e34eda5b41bb4f7162ff4266963adc8cc9da2edd2eb943feb3a845ce32e

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