Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0c5ae4ed2d712b…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 23:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e9985f20da717bcf0183e5d863bf6196 SHA-1: c2ec4029f412fc326127d7504515e7ce2bb95a48 SHA-256: 1b0c5ae4ed2d712ba2a689384585bcf58b831c8535e2d3beb38c40abe0dd4d5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary one identified as a malicious redirector. The document body and heuristic firings indicate a lure for game hacks, specifically directing users to a URL associated with 'Coin Master' game cheats. This suggests an attempt to trick users into visiting a potentially harmful site, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/coin-master-card-collection-link-game-hack In PDF document text
    • http://library.umla.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-level-7-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/comment-gagne-des-robux-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4C 25232 bytes
SHA-256: 70930b60bb4e8b183e40140f82f2a4bbdc44193186806473c4311c064f31786f
font_01_sfnt_off000089ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89ED 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 17964 bytes
SHA-256: ad59076b8e4795e22649a54fdb73642df658d3c1f4ddc63a39bd02642d6714ff

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