Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8ab80f4f00f937…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 20:11:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 689faca44cad54e455d9647476707334 SHA-1: 5bf48fcd3311bc263b852408806d2497710df9f8 SHA-256: 9a8ab80f4f00f9372d4b60f5bcab1faa036837e1c0d29cd76dfe2b8ef551777b
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body explicitly contains the malicious URL, reinforcing the lure. This suggests the PDF is designed to trick users into visiting a site that likely hosts further malicious content or phishing pages.

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/how-to-get-free-spins-grom-coin-master-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-high-school-how-to-get-free-gear_GM431946152.pdfIn 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/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-hack-code-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-planet-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-para-tener-robux-como-tener-robux-gratis-enderrobux-117_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-survey-for-robux_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_off00003285.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3285 23420 bytes
SHA-256: a0c204a8e8543756d7d3796c117cf300825d4dee49bf92024aa2a48c95681caa
font_01_sfnt_off0000679b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 18600 bytes
SHA-256: d82f5682281c307a75ba38574627f6cd0be2eafc174d1f13449bd071f58d983b

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