Malicious PDF — malware analysis report

Static analysis result for SHA-256 319793da3c1a9c31…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 12:55:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 99de4770521c8a46975490f8d8bbc03c SHA-1: db750673759b2a0fabab17039d4686f3877613a5 SHA-256: 319793da3c1a9c316083b7f91d387fda18787d62e11e668d2a9043f105fcd11c
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 http://netcdn.tw/app/479516143/minecraft-free-online-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/pokemon-go-free-battle-pass_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/parrot-wings-roblox-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/all-google-exclusive-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-any-codes-give-u-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-download-google-play_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/play-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-infinite-ammo-hack-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-online-games-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hallowen-simualtor-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/go-to-this-website-for-free-robux_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
font_00_sfnt_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 22232 bytes
SHA-256: b76096572d41e993fc68b0cb3ce4f0165a503515ed4a1b0a5b4dd6b01a84a703
font_01_sfnt_off0000603b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 17928 bytes
SHA-256: aabc457c6fa2ff1a57cb7517c3773770131e5bb15a40066da2bb934e749c82de

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