Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3070ca9e5d0b00…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 05:29:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22d8cedc821c2e187ba19e0cf8581fd0 SHA-1: 17eb18fbeb0c4ea085f00ab035a598d7fc52b5b0 SHA-256: 7b3070ca9e5d0b00cbe912aa1ebb14154e9cdb13f9c52f20b09ee3e996f2f11c
200 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating PayPal and promising free Robux, directing users to a malicious redirector URL. This indicates a credential phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-to-get-free-robux-without-offers-game-hack.
  • 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.online/app/431946152/how-to-get-free-robux-without-offers-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-with-paypal_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_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
stream_004_off00005162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5162 25416 bytes
SHA-256: 45e3af5f956c8ae9d54108d6c89b75eaa67bd0874dce7d2106bbf5ee5e8eac43
font_01_sfnt_off00008be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE5 18768 bytes
SHA-256: 90722031df8f7e72138583497ea9de630fa8b2a13d2a01041543da505e8107b2

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