Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d43f8425f87cdc9…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 00:02:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e18615b01f0a8841927482a16da267fa SHA-1: 6ec2d9f40e1e5ed68881cb1571d7dc21fd262d8a SHA-256: 9d43f8425f87cdc9896f792243e9ebcd465c31a4446c2f24be1d8bcdd7da395c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely leading to further malware downloads or scams. The primary IOC is the redirector URL used in the document.

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/free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://www.perpusffup.or.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-please_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
stream_004_off0000528f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528F 24788 bytes
SHA-256: 0415e65f2ae23569e6ba711bf220dd7a48aa06bab920e13bf4b3b4ce4444cccf
font_01_sfnt_off00008b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 18060 bytes
SHA-256: 64690fddacb88a1b87eb78a3bf181b542b813998c8d2539429c7660090ba79fa

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