Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b9563a08f2cc3e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 07:33:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 48d4dfb67fa9ca296a6894350b66411f SHA-1: 0a2a4d4e7640ea08eef6b8b6bfb142444e6eb128 SHA-256: 13b9563a08f2cc3e13502a78e61e6cf493f1471effb21f3207b70ad7d3f1f368
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to websites offering game hacks and free in-game currency, such as 'coin-master-money-hack-game-hack'. These links are flagged as malicious redirectors, indicating a likely attempt to lead users to phishing or malware distribution sites. The document body and heuristics confirm the lure is related to popular games, aiming to exploit user interest for malicious purposes.

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/coin-master-money-hack-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/this-game-gave-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-free-robux-no-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-cc-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-lumber-tycoon-2-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-you-be-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pubg-uc-download_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/install-free-game-coin-master_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_off0000303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303E 23300 bytes
SHA-256: 1a21378b8cf94e0c1f47b0e3a6938b7f029af1cae779bdf1d56cc15f961f494b
font_01_sfnt_off000064bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 18184 bytes
SHA-256: ab0034aa113820577207db4aaf62a3b22ade484da8517869573635588458df2c

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