Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d53da9c60b4dcf…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 22:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58e42399f79a5883c5925dc476744af6 SHA-1: 83fcf5ddf72c33d6ab7082ee1e7bf58c6497cefd SHA-256: d9d53da9c60b4dcf5871d993875a4778d7f8b2bddac1a642c1252c2453276198
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "game hack" which redirects to malicious infrastructure, as indicated by multiple critical heuristic firings. The document body and embedded URLs suggest a phishing attempt related to in-game currency or items. No scripts were extracted from this sample, but the presence of embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spins-and-coins-for-iphone-game-hack In PDF document text
    • http://escolaarboc.cat/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://escolaarboc.cat/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://escolaarboc.cat/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://escolaarboc.cat/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://escolaarboc.cat/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_003_off0000475b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475B 25092 bytes
SHA-256: b3410738f23a698e269f81c32b855690b89ae2b074855ef99571b0301e7a11f3
font_01_sfnt_off0000814b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814B 18224 bytes
SHA-256: b4646ab3e358ecd7896173e374a4f37f60f7674218af6eb698aacc488fc1d121

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