Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec358f42befef1c…

MALICIOUS

PDF

36.3 KB Created: 2021-07-04 19:50:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 53d5215021e2e0a32c430ea24c95aae7 SHA-1: 9550af23dc9a164c8a487e6317037e5beb0d9486 SHA-256: aec358f42befef1ca665410a384c2281c52cac83b915c8d260ac0483723298df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action phrase, directing users to a known malicious redirector. The primary lure is for 'free Robux' and 'game hacks', indicating a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence.

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/431946152/free-robux-with-no-verification-game-hack In PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-xbox-gameachivements-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/click-delete-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/roblox-speed-hack-freddyfriends_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/cm-free-spins_GM406889139.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_off000034f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34F0 23044 bytes
SHA-256: e2613084c7fba6ddc1197440f64deca5ab3c55aa503e23e31c68dfcffd405482
font_01_sfnt_off000067e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 19436 bytes
SHA-256: 152779ac3709d5a43144f85cc286cfc78713a2961a87782e1bc06cce99e4fdaa

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