Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeb51fdcfcf3c7f…

MALICIOUS

PDF

36.1 KB Created: 2021-05-21 05:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: be04990e6ae77a88c75472373e763d1d SHA-1: 59e3f3f56be2ca4fdcbe698e15fd49df91d19827 SHA-256: daeb51fdcfcf3c7f3db0cc53eb83716dcaaed10cd66ca64d9196226d00105b0c
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector domains, specifically advertising 'free generators' and 'game hacks' which is a common lure for malicious downloads. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest it's designed to trick users into downloading and executing a second-stage payload, likely exploiting a client execution vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/best-minecraft-hacks-game-hack In PDF document text
    • http://shahriyarclimb.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shahriyarclimb.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://shahriyarclimb.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://shahriyarclimb.com/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://shahriyarclimb.com/images/how-to-get-free-robux-without-human-verification-2021_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_off0000331a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331A 25668 bytes
SHA-256: 1f01219cc5c36f98ddf3690b42cd4ce9836a7ee9893c495c41e7687f08b49cea
font_01_sfnt_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 17952 bytes
SHA-256: 6dfee1982b58ab3489cc821793519200b658269375d8b02cd788103d93863fb8

Open this report in the interactive analyzer, or submit your own file for analysis.