Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a3953de747a7f5…

MALICIOUS

PDF

46.8 KB Created: 2021-05-14 01:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2d781b6bdb247bb7ee1a9032fea6c299 SHA-1: aa1620bd147106fc87d3c40ed439fe2ab94b6510 SHA-256: a1a3953de747a7f5c746d4103b64ccee35e34fd3859f675b84c7d8eaf8a05874
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, under the guise of providing game hacks and account generators. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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.
  • 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-hack-roblox-accounts-passwords-game-hack In PDF document text
    • http://joegibara.com.au/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://joegibara.com.au/images/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABC 26128 bytes
SHA-256: a1240907c482584aca50c2019c0689b3a8b0264be49d5e40f48323d3e77ce894
font_01_sfnt_off00008723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000924c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924C 18916 bytes
SHA-256: 1a35cdd5966ddf5a07fa4c0cf1a4b7623ebf18d314e768fc1998c6779142cc7b

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