Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa47a9393035c396…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 06:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c00a3001467768345478c0263a8e5b66 SHA-1: bd394c92a87abb177e0bad2006e20b838598c8a3 SHA-256: aa47a9393035c396adad925f5408b1e9d6ab5972f6253b6f50852e4e387432c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a known malicious infrastructure, specifically advertising free game currency or hacks. The document body explicitly mentions 'How To Get Free Robux With No Verification' and includes a primary redirect URL. This indicates a phishing or scam attempt designed to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-with-no-verification-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-catalog-2021-july-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/speed-hack-in-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/without-pokemon-go-free-evolve-after-trade_GM1094591345.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/como-hackear-gente-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-hair-extensions-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hacks-client-for-roblox-wild-revolvers_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/mad-city-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/files59-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/default-fortnite-roblox-tshirt-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/veil-roblox-hack-paid_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-faces-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-level-7-roblox-executor_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
font_00_sfnt_off00002b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B2F 22440 bytes
SHA-256: 802804577627f52cde70d648781a68af331c46fd1225f77a5fbb920769e00b83
font_01_sfnt_off00005d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 19604 bytes
SHA-256: 1416ca7cd14a43413051d0f78c9165075e98db2c1fb870b3eb17660d32a91470

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