Malicious PDF — malware analysis report

Static analysis result for SHA-256 223515220d61b1bc…

MALICIOUS

PDF

41.0 KB Created: 2021-05-12 20:33:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 599e651214bd82d6784f9843fadeada6 SHA-1: d8ed4f2871bc712cd098e0df4a2dc58151a7178a SHA-256: 223515220d61b1bcef38bd59ffb1895315f89e6c597773d306a53edf897d2900
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, disguised as a "free generator / game hack". The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', further encouraging the user to click the malicious link. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

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/406889139/coinmasterfreespinlink-game-hack In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000329a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329A 24572 bytes
SHA-256: b5f17850e816f76046645c575221b0046c05a9313f9163cf950358c083c10f31
font_01_sfnt_off000069fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000073e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 18224 bytes
SHA-256: 5ac1ce2ac88e7b98134a23e8a83b406c8e40c127b2dbab09a4edbea00c7c47cb
font_03_sfnt_off00009597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9597 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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