Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf07d47f4e41080c…

MALICIOUS

PDF

54.4 KB Created: 2021-06-03 11:16:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3cc16cc0874f056d2281753a3dcfb929 SHA-1: 62e7dd1a555798c960459044a49ff61c51f4ae27 SHA-256: bf07d47f4e41080c1a41652483575ae8421c5fb486c80cb57cb7534232dcc3c3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9499

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/479516143/what-is-wurst-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-through-easypaisa_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005297.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5297 25188 bytes
SHA-256: 81c3549b72f5e0c7f45fcfba1987d1fce49231c0e9c6132d5a10d54a9461f191
font_01_sfnt_off00008b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8A 7976 bytes
SHA-256: 4dc4ad07cf3e6043d4a808355ca493d008d5122f67f9269d5ab96a9e30b888dd
font_02_sfnt_off0000a4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D8 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB365 17952 bytes
SHA-256: 68b7317228aea096fce823b84819f53df56dc0eee70fa2894e05b7ec7d9599c6

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