Malicious PDF — malware analysis report

Static analysis result for SHA-256 37688857c616fa43…

MALICIOUS

PDF

36.1 KB Created: 2021-05-20 19:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a3ac86ee7e4a87ed7287e4f1df784193 SHA-1: 571ccae490bf2383d9fcf9f70b76fe9fa8d26109 SHA-256: 37688857c616fa43ec53c95d61c76af74cf0f7313213adb2dae2f775f624e7f1
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and sites offering 'free game hacks' or currency, a common lure for phishing or malware distribution. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this pattern. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit users through social engineering, likely leading to a second-stage download or redirection to a malicious site.

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/free-minecraft-bedrock-game-hack In PDF document text
    • http://www.fluidtech.hu/images/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000345d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345D 24304 bytes
SHA-256: 51ba74102fbf049401cfd97c14ca4f232e3c3d158273ca3911aa129e5df829bb
font_01_sfnt_off00006bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDC 18268 bytes
SHA-256: d34bffa2112548f8729f10b9022dbaea9618b038b2dadf4195d892bf0ac95b27

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