Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf4478e053c2e94…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 10:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1cb78141b764b415f3aac067ffeab751 SHA-1: 6cfb66289b118b9c1ac7ff70db83cadb586d1ed8 SHA-256: 8bf4478e053c2e9484526742da52bbdf6aed3761e7faa05550670be12f5819ac
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body, though partially corrupted, also contains this URL, reinforcing the social engineering aspect. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used to deliver a malicious payload or redirect to a phishing site.

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/406889139/coin-master-free-gold-cards-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-hair-roblox-not-model_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-the-game-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-be-carrot-god-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-verification-generator_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-robuxian-awesome-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-account-in-roblox-real_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-miner_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/cheats-roblox-pc_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-bc-generator-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-bighead-in-roblox-for-free-2021_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_002_off000033b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B0 22948 bytes
SHA-256: 0d8ba76867f7fdb8cd253208b3121281c933cbe26cb761aab2aade94e3c8c3a5
font_01_sfnt_off00006743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 18244 bytes
SHA-256: 3eec5eb360bf5017ed215d45b36dc0030ce64a4e5d819b76440502fc1e4999a9

Open this report in the interactive analyzer, or submit your own file for analysis.