Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcef8a11e26131e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 19:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63381659d5875040e750e5e6684d3192 SHA-1: f492df29a839421e88c3aeede340be40982df6bc SHA-256: afcef8a11e26131eae7a5eaca2b395e2a40394658cdf9a34aad141e69a092ae5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one to a known malicious redirector, designed to lure users into clicking on promises of free game hacks or currency. The document body and heuristics indicate a scam aimed at driving traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/431946152/how-to-get-free-robux-easy-on-phone-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/xray-for-roblox-for-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/where-to-put-scripts-for-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/va-a-ser-hackeado-roblox-en-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-multi-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/pubg-uc-generator-2021_GM1330123889.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-hack-roblox-games-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-tk-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-pin-t-shirt_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-gift-card-codes-reddit_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-games-that-work-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_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 21844 bytes
SHA-256: f8fa944cbdea7df57df323059d642f08892ab688c3e0036f7e72fc03090c1b6e
font_01_sfnt_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 19484 bytes
SHA-256: 10e6918622a1e1d776f2ac179078ec20795c6faf86adaf8098abaca9041529c9

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