Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b22532ebb144a9…

MALICIOUS

PDF

37.2 KB Created: 2021-05-21 06:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 392655d82c9ee5386b8d15367bc9f333 SHA-1: e30fbfcc60ffb0b0c288ecf8cd0f1badec057eaf SHA-256: 33b22532ebb144a95e43d5d2cebceed04d74c6d1fed0a36e9f07773cfffa3ee4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux hacks' and 'game hacks'. The document body and heuristics indicate a lure to download potentially malicious content. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest a phishing or social engineering attack aimed at tricking users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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.
  • 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/431946152/free-robux-hacks-no-verification-game-hack In PDF document text
    • http://firesafetyservices.biz/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-daily-bonus-hack_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_off0000351b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351B 25208 bytes
SHA-256: a780e7e3c96c05734c5388c8ae1dffff045f157a98ce53922bd4624a3d1bee1e
font_01_sfnt_off00006eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 18772 bytes
SHA-256: addbd32849de550f6a3cbf56c70cbffa7cf804e2f09d57d2f784457513eafccd

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