Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae83a09980b36720…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 07:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dda8761f219e8820071122709a794c10 SHA-1: 48427a23e5b503c4ccf27a20f3295729390c5b59 SHA-256: ae83a09980b36720e5cd476d8e383ee33f1735770124aed0bfde20af74a5f4f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, disguised as free game hacks or generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely to download further malware or redirect to phishing sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

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/free-roblox-svg-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/roblox-cs-go-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-vehicle-simulator-free-vip-server-link-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/console-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-redeem-cards_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-make-free-roblox-audio_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-download-windows-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/did-biggie-get-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheats-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-go-into-somenes-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-redeem-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-roblox-com_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-android-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
font_00_sfnt_off00002cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC6 22032 bytes
SHA-256: 4654d087efc78ddc9e1fee287a93e682aa1ea631a6c74171aed57fe618957ac5
font_01_sfnt_off00005d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D50 18764 bytes
SHA-256: 70fc6a01177e47c8c1a2cb5f0ff3cb11a20591fe23aa8591ad50d23bcd28ad68

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