Malicious PDF — malware analysis report

Static analysis result for SHA-256 23edca16f8961714…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 20:17:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e38dbba8cbe0205ebc6e3cae1cf2afab SHA-1: b49b6fe058eb2c59dfcd71b8bb4db47810d259dd SHA-256: 23edca16f8961714c68f19f56908ea56449df8ac3eb9d044a2d4e43a87c1ee8a
180 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 and lures users with promises of game hacks and free generators, specifically mentioning Roblox. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document likely serves as a lure to drive users to malicious websites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-got-hacked-2021-video-and-evidence-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/get-robux-free-of-charge_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-generator-free-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-promo-codes-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-credit_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/admin-commands-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-tampermonkey_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-create-a-group-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-cards-no-scam_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/joshy-roblox-hack-virus_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-and-builders-club-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-roblox-mad-city_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-use-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/fight-club-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-people-girl_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_off00003134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3134 22220 bytes
SHA-256: c40c73b7c3d69a825858a1646ff094b46bea319169d92ad47a5f06c8016add48
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 19704 bytes
SHA-256: 092f7dd40e1776808fba163ae02974221f6b9c4d4dfd183f80875180b452ecf5

Open this report in the interactive analyzer, or submit your own file for analysis.