Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d3395196144b9f…

MALICIOUS

PDF

35.3 KB Created: 2021-05-20 23:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a8eaefc15cbad00f1479f701b9eac430 SHA-1: 617a4a2fc191e8f1bb0296d00fc99ccd9adbc662 SHA-256: 38d3395196144b9fa9f194b70291d14a7516ff3a0606edd18602e62d4c84fb0a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising 'Coin Master Hack App' and 'free generator' lures. The document body also contains a prominent call-to-action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. These elements strongly suggest a phishing or scam attempt designed to trick users into downloading potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/coin-master-hack-app-game-hack In PDF document text
    • http://giolantapepe.gr/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://giolantapepe.gr/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://giolantapepe.gr/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://giolantapepe.gr/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://giolantapepe.gr/images/free-robux-ad_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_off00003384.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3384 24364 bytes
SHA-256: 84ff9fefc92cbabe8502d65ceb7b069e990e33c92192759fff3b0195777849ea
font_01_sfnt_off00006986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6986 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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