Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e45762be03341b…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 07:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 361524855c646eaae25f61556752007e SHA-1: 3b0776543e09da12b9c345ac212df4efda4e25ad SHA-256: 33e45762be03341b9aa4e1e54fe1fea2c730f9fddb6a0f571595d40891563ca2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'Coin Master' game hacks and 'Robux' generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-game-free-spin-game-hack, which is flagged as a malicious redirector. The document's structure and content indicate a social engineering tactic to trick users into visiting potentially harmful sites.

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.tw/app/406889139/coin-master-game-free-spin-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hackrar-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-cheat-engine-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/no-human-verification_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
stream_002_off00003017.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3017 23184 bytes
SHA-256: b711d291812ea9ce656f28642f9f060f358641fcbba118f76d5920fbac9829e2
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 18432 bytes
SHA-256: a81ce85ab1d38efd73dc51b1055ee083833faa1669764d0dac9c9c7e0fbc8d78

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