Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41194b793c87516…

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 07:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea49fc5ad95ffc6067a73feba4474a69 SHA-1: 59b928b99d41d33db61e4f1a72274d460d1219ad SHA-256: d41194b793c87516b51dd49ed7896148ad0245c3dcc22807ea89522c41c0f60a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as generators or hacks for popular games, directing users to potentially malicious sites. The heuristic firings indicate a malicious redirector and a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the document structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hacks-iphone-game-hack In PDF document text
    • http://halle-wasserball.de/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-modded-minecraft-server_GM479516143.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_off0000484c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484C 24664 bytes
SHA-256: 283de7b452c54508ea1d2d678e405a3d9a721ee43ff7311a15341532b7d16b6e
font_01_sfnt_off00008025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 18060 bytes
SHA-256: 9ccc1d8bd8827427bdd2e576ac4afcbf92768d6c7b4bf1f6dc8c42a95cbbb1c2

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