Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50bcf9cb005bbf6…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 01:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c8e0223ae3edd8c3040bc17afa48668e SHA-1: 6a98c05694477b64b32379058de81fe567e9290b SHA-256: d50bcf9cb005bbf640dbb44a5f676c23b136890b8a6c000d3c6f914a3bc43cee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a 'free script executor' lure. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector is in use.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-script-executor-roblox-game-hack In PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B4 25160 bytes
SHA-256: a49a488085a8156748ceb75812d678c4252847765e2710a1119dc2e046c78022
font_01_sfnt_off00008242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00008eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEA 18488 bytes
SHA-256: c1d8906df7cfed201442eecb2c05ff4a638972dd76746327367067a9273c3e32

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