Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78bb3766ef668f1…

MALICIOUS

PDF

40.9 KB Created: 2021-05-15 00:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93deadd483f6da5ee724f682e8a08f9f SHA-1: 5252aca5ec21263737ef5e52f32c8e65f3d5a797 SHA-256: e78bb3766ef668f1de240cbd30484742467e26bff3872c4e0f811aed0d9f8920
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master App Hack'. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual download button lure suggests an attempt to trick the user into downloading a payload. No scripts were extracted, but the overall pattern points to a phishing or scam attempt.

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-app-hack-game-hack In PDF document text
    • http://ukrainiansofbuffalo.com/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-robux-today_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_003_off000046f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F5 24384 bytes
SHA-256: 849c8aad175537c1f2b5be388a3607cb10e65575806b36ebecb9e562779869b5
font_01_sfnt_off00007e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 17892 bytes
SHA-256: 38569bedbe5996f2827c101678e23308efeb8581fe2a57cd3cb5ddc3bbed0d22

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