Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edb7d64f1d5c3cc…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 03:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ceb74de2717d944a8e89536f993da454 SHA-1: c02b599ae80005546c2a32a807344583a2470e1c SHA-256: 1edb7d64f1d5c3cc5bb3f43dd6757036a7a7b9ece24dea06b69fd126c7b127f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as offers for game hacks and free Robux. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-apps-that-work-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/431946152/free-robux-apps-that-work-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000481a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481A 24468 bytes
SHA-256: fae43fcd5bdd20b93e8cd03a66fec7e1cbcaa6a5c884b32bde75f232aa0f932b
font_01_sfnt_off00008001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000089b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B1 19056 bytes
SHA-256: 867cc7ed7a05e00a705c8433c5324c57a550f7e7678a2e8c50298e1974253cec

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