Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5e8bfcc2869e96…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 07:50:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b0d5e12d3fe4898dedf176c7e7f8974c SHA-1: 6a68936c9adf5cf326aa40ed5c6e51f0367764ee SHA-256: ab5e8bfcc2869e968c7281226cfefb420c0d655d031bf675bf22dff06bc09764
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'rewards'. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/robux-place-rewards-game-hack In PDF document text
    • https://nendientu.com/public/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-coins_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-generator-2021_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_004_off00004ee5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE5 24956 bytes
SHA-256: 8b2f3e95408dbfc5e52f973022d744e24f91d09eda7cb1864fa3b257e128a543
font_01_sfnt_off0000885f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885F 18644 bytes
SHA-256: 097b3e5fe389c9d5235bb5f39cca6eafd3c2d90897f0534c254bdefdab42f7f8

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