Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1f0ac076635a3d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 19:37:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 05a6ef7dcd5eb65efdad6702930ef2c3 SHA-1: 2fa01cc69f4985b9f4fe85ef01ab4a4345c4ffe6 SHA-256: 8a1f0ac076635a3da6e4de1e4ee43ec0a77eb478b29f38892e88816db39676a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The primary link, http://netcdn.tw/app/406889139/coin-master-tricks-game-hack, is identified as a malicious redirector. The document's content and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely leading to further malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-tricks-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/youtube-live-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/mobilehacks4u-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-20-body-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-de-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/goku-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-level-7-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-2021_GM406889139.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_002_off00002f61.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F61 23080 bytes
SHA-256: 9aab21b183c3948458079793381912ba14964cf1ae5d9b0242b8800a122c81f6
font_01_sfnt_off00006333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 18004 bytes
SHA-256: 567f2d2b3d77c3359d1be486e2dead60d59299be3087a8c66e941a03120e0c5c

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