Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ff9472b8d7db07…

MALICIOUS

PDF

39.1 KB Created: 2021-05-22 08:09:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 415edbd1daa5bd902cb58140d6229c1c SHA-1: 5f35a68e730371cb798c33f7ae560d79a527c93a SHA-256: 87ff9472b8d7db07b9a976bf775529b003dde40c80a8e32b98634e3f6f286a41
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to obtaining free game items or currency, such as 'how to get minecraft for free'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites. No scripts were extracted, but the document's structure and linked content indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack PDF link annotation
    • http://gaec.cl/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/pubg-mobile-uc-xyz_GM1330123889.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003463.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3463 24416 bytes
SHA-256: 484ea606b4dd71bf72825055d6aba763171f6ac04b70dc0db0b8da0acf1b75d5
font_01_sfnt_off00006c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off000076cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CD 18472 bytes
SHA-256: 63446f7755945d37ec8b97d22fda434cb08cbf4c61a02f7f94d2af605f03b611

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