Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e977129c7f97bb0…

MALICIOUS

PDF

48.3 KB Created: 2021-06-07 09:57:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b3ea88abb8a98fe0a12e1353fc2cfa39 SHA-1: 2cbcaef781478731e6f583cb48ea92e9239bd4a2 SHA-256: 8e977129c7f97bb0a324d03308230d721bbccfacc9cc4ef35d32a643a1755f4e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/site-17-hack-roblox-game-hack In PDF document text
    • http://askueandco.com/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/how-to-hack-someones-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://askueandco.com/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://askueandco.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://askueandco.com/images/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://askueandco.com/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://askueandco.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://askueandco.com/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5368 25212 bytes
SHA-256: 641584e3581e4ee24b4f857fb52882677ad1fb0de7f26234ba7472b9f9cc6175
font_01_sfnt_off00008dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEA 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9914 18568 bytes
SHA-256: 53275a346a7c5ca54ff2dd8395ae934a68b3f19215b3802a5bb2450eb05bbe7c

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