Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77dd7422b6c1e1e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 16:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 20c9a322d7c64d164e97766bf4c140c9 SHA-1: 09ba83bc1f9915620dcbf511f9c6d99d1c91bafa SHA-256: a77dd7422b6c1e1e1684f1638d99e6e980558ab9bc73ebe63a91b1cfdf169556
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free generators or game hacks. The primary lure URL is http://netcdn.tw/app/835599320/how-to-get-free-likes-on-tiktok-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious content or downloads.

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/835599320/how-to-get-free-likes-on-tiktok-game-hack In PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-actually-works-no-scam_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-hat-generator-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/cheat-jailbreak-roblox-money-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/hack-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-make-a-roblox-hack-video-thumbnail_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-characters-without-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/robux-gratuit-hack-facile-sans-attente_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-cheat-wall-glitch-hack_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/strawberry-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-builders-club_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/new-roblox-items-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/peple-hacking-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-coin-spin-daily-link-net_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
font_00_sfnt_off000032f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F3 22008 bytes
SHA-256: 6dfc034445dec2d9b2e6d3ef1e9bc1451c643066010e711f03f860a11d20845d
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 18136 bytes
SHA-256: 9be82b9e87c76be08840925351ca9f044162866092bd9222233490d8cf5a8306

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