Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f784feb5c981359…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 01:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ccf02dc95fa1fe039d159e5cbbf4495 SHA-1: bd5d025adaeab9b3316d2258003d0af05fb39312 SHA-256: 7f784feb5c981359426108e6756f641fdc8b5343d32d68fd59583f4449bac7ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack generator, but which redirects to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a visual call-to-action button further support a phishing or scamming attempt. No scripts were extracted, but the document's structure and embedded links suggest it is intended to lead the user to a malicious website for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-hack-roblox-tutorial-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/see-through-walls-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/granny-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.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_off000052cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CC 25772 bytes
SHA-256: 63dada556f0fbb848d6ea5125c010ef5a14ad4062a6e2ae9b05e50498b07173e
font_01_sfnt_off00008e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E48 18712 bytes
SHA-256: 23e0ca3f4be546c3e8d209bdde99aaf2ee8509043d328081a26eaf0ce6d856cb

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