Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ea8ef9280ab1ef…

MALICIOUS

PDF

41.3 KB Created: 2021-05-20 16:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7bab5aa64d2dd46ea95cb0f970c843ab SHA-1: 9a27f790a717351f1aae70b6d564cc90e9fa3a6e SHA-256: 89ea8ef9280ab1ef5284012d100f100387a3529449f3c969cc72bfaac17bb2c3
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 0.7471

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-free-game-hack PDF link annotation
    • http://www.art-concept.gr/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.art-concept.gr/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.art-concept.gr/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://www.art-concept.gr/images/master-free-spin_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_off0000361e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x361E 29460 bytes
SHA-256: 47a0fc53d9acc9785ef5313cc9a22a848898165592fb9cb236378f43fc3f758b
font_01_sfnt_off000077e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E7 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00008259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8259 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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