Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a74f1c626e0600e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 01:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e69b4a3bd62bb43fb883dca0859e0807 SHA-1: 8a2a27b5ee572d27dafe8043a53eee3b2aac1012 SHA-256: 7a74f1c626e0600ef78905e95c0b38fcb2dcb299720c4c1faef9b3d5a3df3259
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-com-robux-game-hack. While no scripts were extracted, the presence of malicious redirector links and the lure of free in-game items strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/431946152/roblox-com-robux-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacker-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-jailbreak-speed-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/apex-spice-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/earn-free-robux-scam-sites_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-yourself-levels-in-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hackeando-los-ordenadores-de-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-coins-on-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/admin-code-for-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/bloxburg-roblox-bux-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-account-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/those-of-us-who-remain-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-admin-hacks-name_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334D 22656 bytes
SHA-256: c7780344c34171055db47c7479f56f64d113b08169f8b63000f49b31288e25e9
font_01_sfnt_off00006603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 18884 bytes
SHA-256: e620399073dc72bed217de18bfdfca4c1e783d6308a803db1d0d31c149f865d3

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