Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d6c80fb9f7a0f4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 11:35:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4f497e9ecf053d17ca5829ad99b0b0e5 SHA-1: c92c77273b020b2023f355742faa9076ebfd3525 SHA-256: a7d6c80fb9f7a0f4f16918a4c45be18e1048c2bf047ae88491cc4bc6e029de71
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free currency to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/roblox-adopt-me-hacks-2021-game-hack, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to deliver a second-stage payload or phish for credentials, aligning with common social engineering tactics.

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-adopt-me-hacks-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-studio-free-download-android_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-buying-it_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-items-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-tools-for-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-clothes-for-roblox-avatar_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_off00002fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBD 22180 bytes
SHA-256: 6b0b1e5e5b9e95ccbd7e81684397d36e5401bcfc4656fc930c43b7dc8033b368
font_01_sfnt_off000060ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 19708 bytes
SHA-256: 3e7968c6009158f39a26a5e9beb619e98d82cfcdddd9bb58ca36d4861618e68e

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