Malicious PDF — malware analysis report

Static analysis result for SHA-256 423e24fac60862bf…

MALICIOUS

PDF

39.5 KB Created: 2021-05-20 18:03:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f0e5796bda7c23f3723e9d1173947818 SHA-1: 1aa859ad8094fca7823f714dc6727d01a70fba7c SHA-256: 423e24fac60862bfa33e38bbd8b523983c4eea6567ac76f1dd88a6757ac7c068
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 0.8060

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/431946152/roblox-its-free-game-hack PDF link annotation
    • http://aspiesretreat.org/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://aspiesretreat.org/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-spins-2021_GM406889139.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_off0000335d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335D 25864 bytes
SHA-256: aef94cacdde696140780b2707e35dde31d596bfcad32112ce49b90ff77de939a
font_01_sfnt_off00006f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F78 2948 bytes
SHA-256: 12fde2004c7321abd20d59e9c4b53efe98e8e7094c95f26a137b573b5e7c973e
font_02_sfnt_off000079ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 18052 bytes
SHA-256: 28e620bd92ed75496c639b0b0098322fdf5e49df4814623abb0c2769f623a81c

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