Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b12a4a4fb09dd2…

MALICIOUS

PDF

37.9 KB Created: 2021-05-22 12:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b3296446f1a93e7608a65a41da46321 SHA-1: 8f00345bdb188edd3d35435b80613c1d477f9358 SHA-256: 40b12a4a4fb09dd2c008d0eba8f6cd9955be28ff49609e288151563ef1778bf8
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, disguised as a game hack generator. The embedded URL leads to known malicious infrastructure. The document body and other embedded links further reinforce the lure of free in-game currency or cheats, aiming to trick users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/479516143/play-minecraft-online-free-game-hack In PDF document text
    • https://pemadamapi.net/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/get-free-robux-info_GM431946152.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_off000033c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C2 28916 bytes
SHA-256: 9a1ce5e1fd1d9ea344275d3140c10ca6840d32a39715460f0f6f9870a1cf7d81
font_01_sfnt_off00007439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 17976 bytes
SHA-256: e953997c623ab1bd3546e7b188ca680e36d1015a1cf7f46efbbf98890a47325d

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