Malicious PDF — malware analysis report

Static analysis result for SHA-256 91907ea67dfb6487…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:29:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 602d3bd83b1dde3bb1fdc351ff687e8b SHA-1: 6acecdc0105d82047d0f87d3492b69e55669e2ea SHA-256: 91907ea67dfb64878b1f221e48bb394a2602f2d2cc5682f6c64c8b4a8bdae5fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' content. The primary malicious link identified is https://netcdn.online/app/406889139/how-to-hack-coin-master-spin-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to potentially harmful websites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/how-to-hack-coin-master-spin-game-hack In PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-spins-2021_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D7 24600 bytes
SHA-256: 9f3b6d1d6c5c3f2070c6eec61195882dedb3c84c4e52ec873deedca6746bcfa0
font_01_sfnt_off00008973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8973 18056 bytes
SHA-256: 5e82f79f4c6ef45b1ad688a3ba1018d76c0b9c4c9956dd607c838570fa3f70c1

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