Malicious PDF — malware analysis report

Static analysis result for SHA-256 a150242891ba8255…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 21:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1ba827b4b23ecb1bf7dc44165710208f SHA-1: d8b40c354799c9227653d04985244f6a887b09f2 SHA-256: a150242891ba8255cde0809d3df66265471c80d7d0e26e56c2069ba52568e47b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains, masquerading as 'game hacks' or 'free generators' to lure users into clicking. The heuristic firings indicate that the document links to known malicious infrastructure and employs a common lure for potentially unwanted or malicious downloads. The presence of embedded URLs and the document body content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-hack-spin-link-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-rocitizens-cheat-codes-may-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/tiktok-free-vs-premium_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/claim-free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-fb-champion_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_off00003524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3524 22892 bytes
SHA-256: 117ae0bfcd80d1af0e54baf2a992efed87feb66a96f16ab6661aa803188864a9
font_01_sfnt_off00006871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 18180 bytes
SHA-256: 8089ec70024e38c963cd1b8e4fd66f251d2ac35f3e2526171ef4435f22e5a9e0

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