Malicious PDF — malware analysis report

Static analysis result for SHA-256 44958116fd421d17…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 06:57:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fe2586d4dfeec6a4f6eb61614e13d731 SHA-1: b80497597a21ccc2f484c97823d7ad93754dc9e7 SHA-256: 44958116fd421d17f18a6fe623ce03dc805c5006bea393f1b7d27ffc62b05a96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, as indicated by the document body and heuristic firings. It contains multiple embedded URLs that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The primary malicious URL observed is http://netcdn.tw/app/835599320/why-tiktok-free-download-game-hack, which is part of a known malicious redirector chain. No scripts were extracted from this sample, but the document's structure and embedded links strongly suggest it is designed to lead users to potentially harmful websites.

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/835599320/why-tiktok-free-download-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/is-pubg-uc-hack-possible_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-hack-android_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-transparent-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/descargar-roblox-hackeado-2021-para-android_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-no-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-sypnase-for-free-roblox_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_off00003258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3258 21700 bytes
SHA-256: dbd8d3a824f8c31e650b90d544d79b5e236be44952347e2ac515d2f58f14f6d8
font_01_sfnt_off000061f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 19096 bytes
SHA-256: 53b098ceb991a49e45a767ccdd5fa5d5c4bf7fd473470c7ef027785feab13df1

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