Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b372bf8f7b9345…

MALICIOUS

PDF

36.7 KB Created: 2021-07-06 02:08:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f955a707e6033f8e064561d39b93484e SHA-1: 8884b5117a7045b48e0858b22cd910859fe81244 SHA-256: 95b372bf8f7b9345417b892de579e47b54ae2943cfe0600609c11c0a3bbdbf59
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one that redirects to malicious infrastructure, likely as part of a scam to trick users into downloading unwanted software or visiting malicious sites. The document body and embedded links promote 'free generators' and 'hacks' for popular games, a common lure for phishing and malware distribution. No scripts were extracted from this sample.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/minecraft-xbox-360-free-download-code-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-look-like-a-pro-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-jailbreak-new-hack-2021-working_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-redline-v3-0-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robuxian-hack-to-steal-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/easy-hacks-how-to-get-robux-without-buying_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-money-on-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-make-a-free-shirt-in-roblox-no-bc_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/2021-unpatchable-how-to-noclip-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-jump-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-without-verification-2021_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_off0000348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348C 23268 bytes
SHA-256: 43c766ef341acbfd472b9b4eaa694cf1eb400a51a13ab19a584a9fdb1b206bbd
font_01_sfnt_off00006885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 19688 bytes
SHA-256: 43ad2a227d4b371ba67af57b99e7f6a6af10e005219d52730f421fc1693d706f

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