Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a629775cce8d38…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 17:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 065e52170ae82aa83a80a5815bcf16d8 SHA-1: b53350e2ceebf9ce534e4bb7036e06d3b860b11e SHA-256: e4a629775cce8d38a21734708f905cdd5c12e9fb59ae3771923c05d5a8a67de9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one prominent URL identified as a malicious redirector. The document body and heuristic firings indicate a lure for game hacks and generators, aiming to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/dragon-ball-online-cheats-roblox-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-cheat-infinite-jump-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-maniac-robux-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-download-unblocked-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/dead-mist-2-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/getting-hacked-on-roblox-prank_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-afk-cheat-download_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-in-app-purchases-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/one-piece-millenium-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/freerobuxno-games-no-sighning-up_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/boku-no-roblox-remastered-money-free_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
font_00_sfnt_off00002ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF7 23172 bytes
SHA-256: 5aa8d3e26535d3954500884b69c537826bf8fbdfeccbc3361817ff53dbcb478b
font_01_sfnt_off0000638f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 19044 bytes
SHA-256: b7039f52ebe630ef5f25c9b04055e5f68ba2db358dd527c77b5ed4410633a97b

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