Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2ac2d93fa0e10b…

MALICIOUS

PDF

33.9 KB Created: 2021-06-17 23:48:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ade6d67c9aaaab9f949d67838fdb019f SHA-1: 5d95de76b3bf54ce288118f7d20a32c92b741fd4 SHA-256: 8e2ac2d93fa0e10bbc298eb171360a5fbe2c9f6113e0eed7bd16c3fa1794ce32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/copy-and-paste-free-robux-game-hack. The document body and extracted links suggest a lure for free game currency or hacks, a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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/copy-and-paste-free-robux-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-codes-2021-wiki_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-uc-20219_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/fre-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-on-the-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/working-hacks-for-roblox_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_off00002c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C41 22272 bytes
SHA-256: 989e7a4de2b23ed3a472c8ae61c6466f9a850e47c5fda65cb02429f914abd4b5
font_01_sfnt_off00005dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCE 19504 bytes
SHA-256: eb670630e97b866f7141552cd97546917d6c629171a947ae8ef492a73dddc9bc

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