Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65e989871401f69…

MALICIOUS

PDF

43.0 KB Created: 2021-05-18 04:22:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 09242d7feccd74b07883da80508d35c5 SHA-1: d6110e5d3ce99f8007040a7acb25b9ef7eb44b38 SHA-256: a65e989871401f69eeaa9951ec3d943b090a6001a4d3150992777204f50b816f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites offering game hacks and currency generators, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to drive users to malicious sites, likely for credential harvesting or malware delivery.

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/robux-withdraw-game-hack In PDF document text
    • http://halle-wasserball.de/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/https-rbx-place-rewards_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-hacks-android_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-coin-master-cheat-engine_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_off000046bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BC 26116 bytes
SHA-256: 1e07ae4fd957d5ab7d234a2d4c266f78510b56cf6ea481583313b21b0b7f8633
font_01_sfnt_off0000837b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 19004 bytes
SHA-256: afbca514ad09227755e431614afc8addacc3d3b35e400dc0197c8deef3f460d7

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