Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4453683220984f9…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 05:51:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dd47446639a03ee415f2ae9f64406243 SHA-1: 5959971ea9c2b0331f9422fcf399a37ed769c001 SHA-256: f4453683220984f993e7e1693a8690a23f72f16b4d5892ee7fcf92d73d41671d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, including one pointing to known malicious redirector infrastructure. The document body and heuristics indicate a lure for free game items, likely leading to a scam or further malware. The presence of a large number of SEO-optimized PDF links suggests an attempt to distribute malicious content widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/free-minecraft-java-code-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-comment-avoir-le-shirt-swat-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/adopt-me-roblox-hack-money_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-and-tix-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/youtube-how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-games-that-actually-work-2021_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
stream_002_off0000333a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333A 22932 bytes
SHA-256: 0a48e8443a49aeb9a246adec7317b93102eeeee9450063a9f1b649e3a0ce5de4
font_01_sfnt_off0000667b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667B 18452 bytes
SHA-256: 5311ff163cb5fa31e0ff5346c8b8368b0c4116a432924275301f829a2985271a

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