Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1183eae6056bd06…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 11:19:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ea43c793d6acb0b14a52304c8d823c7 SHA-1: 4f3eda431b0486916ee9141c71cd7064d53cf458 SHA-256: a1183eae6056bd060b201eed35cf006540ebd9039f359d549e41cc3b7957cdeb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically directing users to 'https://netcdn.tw/app/431946152/no-gravity-roblox-cheat-engine-game-hack'. This URL is likely intended to lead the user to a malicious website, possibly for credential harvesting or malware download. The document body, though heavily corrupted, contains references to game hacks and the same URL, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/no-gravity-roblox-cheat-engine-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cheat-engine-roblox-edit-values_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/como-hackear-coin-master-gratis_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_004_off00005236.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5236 26724 bytes
SHA-256: b5b8f447324a9f555f2a46062fc739f033fb743edca6d320c4886f876adb2471
font_01_sfnt_off0000909a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909A 18984 bytes
SHA-256: 181f91f48dd3b8432bd79a141cc4ddd9f9adad3d2425cc21f41db03316d91579

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