Malicious PDF — malware analysis report

Static analysis result for SHA-256 837a5d98edaa199a…

MALICIOUS

PDF

36.5 KB Created: 2021-05-10 22:17:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8450c20b8aa6dab063648c9b3045f18a SHA-1: 65b6824bef54dc9fb44069a4e9835252b2657973 SHA-256: 837a5d98edaa199a5a134b2cab86895be5eb15b061e3100b5d56270092e2c151
130 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as a lure for a Minecraft game hack. The document body includes phrases like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', indicating a social engineering attempt to drive users to malicious sites. The embedded URLs are highly suspicious and likely lead to further malware delivery or phishing pages.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/minecraft-free-version-pc-game-hack In PDF document text
    • https://playhack.in/minecraftIn PDF document text
    • http://www.freenom.comHeyIn 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_003_off000034b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B1 25208 bytes
SHA-256: 70b906a48dd70333af62c856b7f509c38fd5f893c07362f44ac2cd1706ab7043
font_01_sfnt_off00006e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 18000 bytes
SHA-256: 596bbbc5b74f8f8d5f8cfb941eefd0324f2b497cb668fe7d549b39bc00e1e0cd

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