Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcdfe21837174f6…

MALICIOUS

PDF

42.6 KB Created: 2021-05-20 02:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5a1d9a3ee51470d910f34641ce1e8356 SHA-1: 0a40c97a77d2396efe7db7531f3988c252bb9d0e SHA-256: ebcdfe21837174f60158ed5f5e1ca8506257f6278b1d026c9ed52247aa1bb6fa
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors and other potentially malicious PDF files, disguised as game hacks and free currency generators. The document body and heuristics indicate a lure for game-related cheats, directing users to external resources. No scripts were extracted, but the embedded URLs and redirector links are strong indicators of a phishing or malware distribution 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/406889139/coin-master-free-coins-link-2021-today-game-hack In PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/can-pokemon-go-free-promo-codes_GM1094591345.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/robux-app_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.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_off00004d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D20 24052 bytes
SHA-256: 3a7109867e2b257685dabdeb28e920aca53ce183aff96a989ee130b3cb59fb87
font_01_sfnt_off000082bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BF 18636 bytes
SHA-256: 54ee628be55815102d4fd2b2c16d0cf2d83f73b68c782c007c481b291bfa8535

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