Malicious PDF — malware analysis report

Static analysis result for SHA-256 df02199de54c6802…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 01:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 05ef764b3c1d067167bf3fc1998ed876 SHA-1: d2d3a9d2fe6fe44a6444d2891e5ac53990b1bdd2 SHA-256: df02199de54c6802b15f746a298b0b481b780ab3e41e43c08f83bba1fd14dcbb
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 infrastructure, masquerading as a lure for game hacks and free Robux. The heuristic firings indicate the document is designed to redirect users to potentially harmful content, likely as a precursor to further malicious activity such as malware download or phishing. No scripts were extracted, but the embedded URLs and redirector lures strongly suggest a phishing or exploit delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-to-get-infinite-robux-game-hack In PDF document text
    • http://librarysenior.com//repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/cool-free-minecraft-skins_GM479516143.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
stream_003_off000049a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A9 24848 bytes
SHA-256: ea3f3171f958f148d5df0ddfc48e7e8a0f8781551a30ffd5f7f6cbf75469fc69
font_01_sfnt_off000082db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DB 18236 bytes
SHA-256: 8217e2720e15cc92b3bb050ea8e30655d207dd8077634fd20a14500b8eab7772

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