Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d34111039618c8b…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 07:30:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 21576f1fdcd4a225d270a03164e1fee4 SHA-1: 6e03be26b9af03966e46d0775fc4366fbcc4c4df SHA-256: 1d34111039618c8b905eac10419df87694a945cc0a1ce7fc112f6c69cb5cf90a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency and hacks, with embedded links pointing to a known malicious redirector. The document body explicitly mentions 'Get 20210 Robux Free' and includes the malicious URL, indicating a phishing or scam attempt. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

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.co/app/431946152/get-20210-robux-free-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/blaze-games-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-clothes-code_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-acounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-cs-go-hack-nasl-yaplr_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-2021-hack-face_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-hack-working-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/site-17-hack-gui-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-hacks-pc_GM479516143.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_off00002dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDE 22700 bytes
SHA-256: c0ec2b2f8eb12a994d287d0fea2b2dfb08549c4f6ad1eb395b75f6f52341989d
font_01_sfnt_off000060fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 19224 bytes
SHA-256: 360adf4800d69ebb10572c14b4da5419c5dfdf2532747118a461d6c69179d592