Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71883976e8fa063…

MALICIOUS

PDF

42.7 KB Created: 2021-06-04 00:26:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: de46f6ac4fa1072a75ba1e82bfaa1655 SHA-1: 1070cad62809d51bc030f02193d57f4142a0e87e SHA-256: b71883976e8fa063d14aa8a13a2d1d08da1b41e81cc7fa39ec553940dc540764
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free coin generators'. The primary lure is the URL https://netcdn.online/app/835599320/how-to-get-free-coins-on-tiktok-game-hack, which likely leads to a download of a second-stage payload. The document body and embedded artifacts do not contain executable scripts, but the overall structure and linked content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/835599320/how-to-get-free-coins-on-tiktok-game-hack In PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/hacker-names-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-minecraft-capes_GM479516143.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_off00004fcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCF 23820 bytes
SHA-256: 1be0898094c4ebd86713f5545e7ee92fdf5155d2ed492fe6edab70461b9d6425
font_01_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 17620 bytes
SHA-256: a70420454de2d0aac39539e39c590a982a6360a54609316ad93aa98ab536d9bf

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