Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f39e0294a15ece…

MALICIOUS

PDF

35.8 KB Created: 2021-06-23 12:47:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8162c6bacd9caa664096595afb24e5d7 SHA-1: 9664aa487807871470d5acde6a6012af59976c6d SHA-256: e1f39e0294a15ececb221129861019cef5874058c2305fe4edbc38d3649730ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are advertised as 'game hacks' and 'generators'. One of these links, http://netcdn.co/app/431946152/how-to-download-hacks-in-roblox-game-hack, is flagged as a malicious redirector. The document's content and heuristics strongly suggest a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

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.co/app/431946152/how-to-download-hacks-in-roblox-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-codes-generator-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-without-human-v-dr_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-tiktok-jelly-fruit_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FC 22108 bytes
SHA-256: 348c3c0412bd2ea317d3cd40362f382ca6763153f293950d3ecdf5cbd9937c6e
font_01_sfnt_off00006691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 19160 bytes
SHA-256: 7132cebe0444c825087bc22ec6ebc72e4395a81da4e7eeaf0aaa8ace4a1119c9

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