Malicious PDF — malware analysis report

Static analysis result for SHA-256 934a8908fffb4780…

MALICIOUS

PDF

34.2 KB Created: 2021-07-02 04:26:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1db416b940b461bec5ad3ace0df8b43d SHA-1: 102da755577e9c63acd983e00c5982290a297cda SHA-256: 934a8908fffb4780e9f609738fc330447bcc14f3dcfaf60d6ddeadc36e5dcf18
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. These links redirect to malicious infrastructure, specifically a known redirector, which likely serves as a gateway to further malicious content or downloads. The document body and heuristics strongly indicate a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/get-free-robux-skin-tone-game-hack In PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/increible-hack-robux-pastebincom-80b1sjzp_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/download-hack-roblox-adopt-me-money_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-jailbreak-inf-money-hack-youtube_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-tshirt-designs-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-hack-cheat-engine-download_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-gift-in-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-hack-generator-robux-gratuit_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-snowman-simulator-cheats-2021_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-animation-package-roblox_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
font_00_sfnt_off00002e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2B 22580 bytes
SHA-256: 788a27f2871cd1fd8764803ab3402e772e8d95791fb43feeb9f3a1441a21fdd0
font_01_sfnt_off0000607a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 19108 bytes
SHA-256: ac26aa88d42ae855da54fd81ebd66bc2c29f5c0ac927492b43bb402a22483087

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