Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5e3ea35c8517f8…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 22:41:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4002b121761591fff274a02bf8cbc4c5 SHA-1: ac82fdceea3e300029efc3f49011671aca3e2d5d SHA-256: 3b5e3ea35c8517f8d981132a2bebdf3501b6b00ae8e70411b678c4cc0f9e0d33
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains multiple links designed to lure users into clicking on them by promising game-related hacks and currency. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and heuristics confirm the intent to trick users into visiting these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/roblox-build-tools-hack-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-robuxapl_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/legit-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/best-free-roblox-hacks-software_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/military-sim-hack-roblox-vikinglaw_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-in-cafe-v4-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-hack-that-isnt-fake_GM431946152.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_off00003111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 22780 bytes
SHA-256: e5c30767d1a358eacf446495fa830d1c19d82561755a580e18529857e0bc2741
font_01_sfnt_off00006417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6417 19088 bytes
SHA-256: 1ee73e4482e706756d472c46765d302743b429c5631b1f1bc52371a02b82db84

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