Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcb2c09f10f6fea…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 23:51:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae276ad037cd21433731844a134713fd SHA-1: 94322b25079761582446c7216319baf79a8a9f79 SHA-256: 5bcb2c09f10f6fea95c56ac8820cdff9609c2eb8a20b5421565f5e4e008ec8ba
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector domains, including one impersonating Microsoft to lure users with promises of free game hacks or generators. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. The embedded links likely lead to credential harvesting or a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-svg-free-game-hack.
  • 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
  • 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-svg-free-game-hack In PDF document text
    • http://jasab.fr/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://jasab.fr/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://jasab.fr/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://jasab.fr/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://jasab.fr/images/hack-my-game-xyz-coin-master_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_off000032e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E5 25048 bytes
SHA-256: 4c797e78b04c295f7789fa342d4536f1e3ff948611615979db44f7c1d8e0e41c
font_01_sfnt_off00006bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 17968 bytes
SHA-256: f82c060a5662ddcca675aec0cfac04b32032cde6baf3a8524f802f6fcb7e6d40

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