Malicious PDF — malware analysis report

Static analysis result for SHA-256 5305f915eced22fd…

MALICIOUS

PDF

42.8 KB Created: 2021-06-03 23:51:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eff8d41afc9595ab55b932e3ac1decc3 SHA-1: e1d3b040286ad70d154bde99e6104388d08f8ac5 SHA-256: 5305f915eced22fdf47295787decb1372d7a8f536e543a625301b6a6296b1308
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a malicious redirector, masquerading as a game hack generator. The heuristic firings indicate the PDF is designed to lure users to malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/hack-coin-master-ios-game-hack In PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-tiktok-coins-2021_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/pubg-uc-zip-file_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-free-tiktok-coins_GM835599320.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_004_off00004f58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F58 24468 bytes
SHA-256: aeaae5e924c887244a4933dcbeb2f8fbb2e4432ce21cb66b12a2a84e35745a95
font_01_sfnt_off00008652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8652 17716 bytes
SHA-256: 4e3a035fcc4d7e34a70bc1936180ad88d62d1a278a85b436915b1920e97724ff

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