Malicious PDF — malware analysis report

Static analysis result for SHA-256 45df3e7e32b48955…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 11:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7e669db196a84a55bd121b1ea21106b3 SHA-1: 02c3e93b0743c759cfb6f63e433298489ba02ca8 SHA-256: 45df3e7e32b48955c7c2a634ec98e8ab83748c3ded4d072ba1d3312173ca1550
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator / game hack" content. The presence of a visual download button and the overall theme suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate malicious intent, likely leading to a secondary payload download.

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/how-to-sell-t-shirts-on-roblox-for-free-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-account-generatorold-account_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-for-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-things-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/go-thru-walls-roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/www-rubux_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_off00002f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86 22316 bytes
SHA-256: 865a82d61330f8066f81a5f840e899f3dcbb08d7b5646329fcfa139355bc012b
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 19204 bytes
SHA-256: 179eef0d120d62ad9ecbac5c5f6d5c0398eb96306a42b5c7ceebf7e8be5302ad

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