Malicious PDF — malware analysis report

Static analysis result for SHA-256 948a14ebca1bbacf…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 04:29:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 819da60ddad074e51578ba19903641c6 SHA-1: 6fdd1f71ae48a50d7521897a86d44fa82c522f83 SHA-256: 948a14ebca1bbacf3d95111f3d5db15db44f6be0637972fcf5eb16f237a95edb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators. The heuristic firings indicate that these links are known malicious redirectors. While no scripts were explicitly extracted, the nature of the PDF and the embedded URLs suggest a phishing or scam attempt designed to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/robloxhacks-game-hack In PDF document text
    • http://quatangthienthan.com/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/dailyrobux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-spin-app-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D3 25112 bytes
SHA-256: ff95e5e8f28b799990f50ceed7b92ccbef348e5272740a7a4ef7d1352e8ad0d1
font_01_sfnt_off000081e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF2 18348 bytes
SHA-256: 4c82b5acf2344fb6074e769b7bb8f458d53ebd76102ce4f277dd7245c06f6447

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