Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3471f7a44eb031b…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd285a1c07a7bc37cdea8df0040a5662 SHA-1: 7a5c5953d311bb180e0cef0290ac99216ae0c490 SHA-256: d3471f7a44eb031bef1b733bca81422b290c65979c1188d5d176aaab77649e46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as game hack generators. The primary lure is the URL http://netcdn.tw/app/431946152/how-do-u-get-robux-game-hack, which is presented as a way to get Robux. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering attack designed to redirect users to potentially harmful content.

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/how-do-u-get-robux-game-hack In PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/im-gonna-hack-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-many-has-roblox-warrior-cats-been-hacked_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-posed-ffreddy-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/hack-the-streets-roblox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/this-group-gives-free-clothes-robloxs_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/denis-how-to-get-free-robux-im-not-even-kidding_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-clothes-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-robux-with-no-verification_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_off00003182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3182 22968 bytes
SHA-256: f2ac7067c734c4286e4e9d3f222ae7bf8ac55323a40f1083d964206d9c63437b
font_01_sfnt_off0000650f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 18988 bytes
SHA-256: 62d04ddf0f3dc7e4076f7b6dcac6ca1e5fdd754dcdc61d7a43a0a000b84b24d7

Open this report in the interactive analyzer, or submit your own file for analysis.