Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aac41c6ce4ebeec…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 11:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e0acfcd166fc174b1ecb6ce4a4b089b5 SHA-1: 3c3998a93db27cc41054ae02dcf1cea45861d7f0 SHA-256: 2aac41c6ce4ebeec5c345952a0cd0708e8dd2313a6edc7e5097ee505e47d55dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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/free-robux-no-verification-or-survey-game-hack In PDF document text
    • http://jjpremiers.com/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-robux-on-computer-2021-real_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/app-hack-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/tiktok-free-likes-and-views_GM835599320.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hack-para-roblox-flood-escape-2_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-free-master_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/unlockmygamescom-free-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-jailbreak-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-tshirt-free-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/get-free-robux-2021_GM431946152.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
stream_002_off00002d8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D8E 23008 bytes
SHA-256: dd0ad632d2b91f963086463d9d3d9314b28a12f94943750fba6824c779e08595
font_01_sfnt_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 19368 bytes
SHA-256: 551afc8435a3263a9a14f68c6fac56cdd03dabd4713ff120a4b3cc718d9f39ef

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