Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cab990486f1af5…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 04:25:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 325a52283b366d4d5e5c1bd6a2976a88 SHA-1: 5f08588b5dbbb527fd672bb85c7338cef43a9595 SHA-256: e9cab990486f1af58cc5ba1205dc66866b9147ec40852f8eca3635cabcb34982
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. It also presents a fake CAPTCHA to trick users into interacting with the malicious content. The embedded URLs suggest an attempt to download or redirect to further malicious content, likely exploiting the user's interest in game-related cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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) or Microsoft license-boilerplate 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.xyz/app/431946152/how-to-get-free-robux-without-paying-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-free-spin-and-coin_GM406889139.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
stream_003_off00004957.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4957 24488 bytes
SHA-256: bea1d03fc4c7e3dff48aed43cde87662be47f55061197119a8d02fbe7532dc80
font_01_sfnt_off000081c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C7 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00008bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB8 19616 bytes
SHA-256: cf429e2e91354d73b6f0728fc312d6ff4bad20be80a5ba6db32adcb01c969c4a

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