Malicious PDF — malware analysis report

Static analysis result for SHA-256 8826abac52516927…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 06:08:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7899b5fba04376370416d492c9bde6c2 SHA-1: 22b640cf717166592caa060c4a00680e440ce6e2 SHA-256: 8826abac52516927e49b6429f5300c26dc86b6e09073449cf97d17248c81fb05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are flagged as malicious redirectors, specifically promoting a 'game hack' or 'free generator' lure. The document body reinforces this by displaying a title related to obtaining free Robux, a popular in-game currency. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-get-400-robux-on-roblox-for-free-game-hack, which is likely the entry point for a phishing or malware distribution scheme.

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.co/app/431946152/how-to-get-400-robux-on-roblox-for-free-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-playing-a-game_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/fashion-frenzy-game-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-purple-hair-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-vip-hack-fashion_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-sell-a-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-on-roblox-null-injection_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/add-something-to-inventory-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/elysian-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hackear-contraseas-de-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-without-scams_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-t-shirt_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-death-run-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-gift-card-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-accounts-pastebin_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-code-lyoko-hack-xanafied_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320C 22276 bytes
SHA-256: 69e45fe069482f92a77e6a214bdf364b5bce68e9aaa51626c82386ee2ced0de0
font_01_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 19292 bytes
SHA-256: 76a3591a2cd40b53ec2c9491081149391ff6128e05d9dedb64e20dc05411378a

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