Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa483360f446d07…

MALICIOUS

PDF

36.7 KB Created: 2021-07-05 00:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5afd6ff0477fc022ba3e2a3b1ad7bbc0 SHA-1: 5d4d33483844340b53fee3871aeb5278b7288632 SHA-256: 2fa483360f446d072d095ff9564eab8c79ffc4f87911ac4bf437d7f2029c59bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that appear to be lures for game cheats and in-game currency. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these URLs is associated with malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites, which could lead to further malware downloads or credential harvesting.

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/free-coins-coin-master-2021-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-robux-cheats-no-download_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-studio-ios_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/fre-department-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-speed-client-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-no-generater_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/redeem-card-codes-free-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-2o18_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/in-plain-siight-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-promo-codes-for-roblox-2021-not-expired-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-accounts-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/btools-hack-roblox-download-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/assasin-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-attrition-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/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
stream_002_off000037bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37BD 23340 bytes
SHA-256: d7895b7724a9ebec89f2c8f0d708665d7950378f6e5f34ee088622d53f1616f0
font_01_sfnt_off00006c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 18400 bytes
SHA-256: 2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c

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