Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a415c4bddd8c52…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 06:42:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4252c6149da9b84fdad32e8eff6aab44 SHA-1: 06fe878fa27419c4a945ddcbbe994194ab182539 SHA-256: 70a415c4bddd8c5217cb40d30c127b27eb54238a71e10f8d41a6444ce6a1de70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for free in-game items or hacks, which is a common social engineering tactic to drive users to malicious sites. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/how-to-earn-free-spin-in-coin-master-game-hack In PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/robux-scam_GM431946152.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.clinicalsim.com/uploaded_files/userfiles/files/free-roblox-clothes-2021_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_003_off00004d7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7B 25932 bytes
SHA-256: f757387482a662eaa15fc8358e4f96e85132ebdb8eb93bebba543e86726c6c18
font_01_sfnt_off00008855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8855 18052 bytes
SHA-256: c8469be4e135a939fdcd4d5c4316a8d7a284a9925859706409da67ce72f50dba

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