Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa437fbb2a13a7b…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 02:04:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d01d908c6e39c21d237175174bb32931 SHA-1: 6b0b5866723b2d78d23d79b563b9c1133bb4dd9f SHA-256: 9aa437fbb2a13a7bbe04814e20a1357ad26744cc79df6979e23f56ce05983c0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-com-r-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for further payload delivery or credential harvesting.

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/431946152/roblox-com-r-game-hack In PDF document text
    • http://solidcom.de/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://solidcom.de/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://solidcom.de/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://solidcom.de/images/free-spins-coin-master-app_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000488c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488C 26700 bytes
SHA-256: 189141043ce3b67674b2641a5b82b999bc9b33d0728fa282b0afcb9997135c11
font_01_sfnt_off000085ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AE 18044 bytes
SHA-256: 1bac474c9f29c65064f9d5134d3fb8963ac85574f5d54b941e913c8d0115a2c9

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