Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd69846be50ef190…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 11:12:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 115cc40ca9c6c5822af455a5a48b20aa SHA-1: 6a9fda59576705c7cf95053050f83d9b407fe469 SHA-256: dd69846be50ef1905824e1cf778d24cf6b7a18b92d597e27d7d3186427ef1daf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The primary link, https://netcdn.tw/app/431946152/cheat-cashed-roblox-game-hack, is identified as a malicious redirector. The document body, though partially garbled, contains references to 'cheat cashed roblox' and the same redirector URL, reinforcing the lure. No scripts were extracted, but the presence of multiple malicious links and the ML classifier's high confidence indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/cheat-cashed-roblox-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pokemon-go-free-808_GM1094591345.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pubg-uc-at-cheap-price_GM1330123889.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-minecraft-severs_GM479516143.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_004_off0000531b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x531B 26724 bytes
SHA-256: b50ef3d3a34932d5e205dfb0e46081925464045b55f4e18b1c6826ed7b088a4c
font_01_sfnt_off000090c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 18456 bytes
SHA-256: c5274ac25a0be050cbb514cf72d47fa38d049a17c8adff82c7a373bbb07c4933

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