Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61306ce992defb0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 04:17:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fc92cd42d190a596faa0a9ae73feab4e SHA-1: 6324fc75c0df1df09ef5e79cd35967b2bc8100ff SHA-256: f61306ce992defb0486c23d8fa92d0fa7c776a3154bdfc0e930f5fc56d07e7f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for free game currency and hacks. The document body and embedded URLs reinforce this theme, pointing to the same malicious domain. While no scripts were explicitly extracted, the nature of the lure suggests a potential for further malicious activity upon clicking the link.

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/431946152/robux-com-free-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-free-real-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/rbxboost-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-candy-van-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-free-dominus-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-account-crcker-free-v3million-proxyless_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-xbox-free_GM479516143.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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22604 bytes
SHA-256: e2e3eaec99b286f42d9a03deebc368ed748ee0e62ef67daa6e51a3755d7d0801
font_01_sfnt_off0000629f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 18976 bytes
SHA-256: 27896acad5ca474033774e3721745fbaf6546dbb33b60a4a93bb974a81ff43ff

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