Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1c3327e1d4029e…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 01:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5c33b2a20c437c9f8fa86ac040171a52 SHA-1: 6d2249e6b341bd1b6bad0eef7da441bcfecf0eab SHA-256: 4d1c3327e1d4029e8334a2bc4cd34021ea6fe4412cfcfdcd6eefc2efa7cd7f48
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 0.9492

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/minecraft-pe-free-ios-game-hack PDF link annotation
    • http://centr-expert.su/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-codes_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_002_off000034ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34AD 25472 bytes
SHA-256: e19f36d532c2d1f98c653017a0eb1f1284232c244fab9e142aa251588063dc8e
font_01_sfnt_off00006ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBD 17864 bytes
SHA-256: 9df2ada10360c1ec44bdaa5c5cca5c0d6bee254865ff2f5281c544f8bee3309a

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