Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c1e1bf68acbbee…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 15:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 017a815d153373615a70c379c405dfae SHA-1: cd54746d3166b253e890db59a5a67becb17d28fb SHA-256: b0c1e1bf68acbbee47877854188649bfdca3cbde188c0bd2692b887132963672
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains embedded links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-free-coins-hack-game-hack. The document's structure and embedded URLs suggest it is designed to lead users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-hack-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-on-roblox-in-3_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/is-it-hacking-if-i-use-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-have-free-robux-in-a-web_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/eternal-empire-roblox-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-without-survey-and-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-apk-oct-18-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-free-doge-hat_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/trigon-hack-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-any-roblox-game-pass-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/bux-gg-robux-free_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_002_off000030be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BE 23272 bytes
SHA-256: d11c2b0201fa0ae73eece9abee330b360a934f88e251ef874aa0a81e7600ff14
font_01_sfnt_off00006552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 18168 bytes
SHA-256: f6a958b5ee3bd5b31fa7bb34e70f4f188eadbb3e5a663de667095cc8c499d1ed

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