Malicious PDF — malware analysis report

Static analysis result for SHA-256 2006bc44531bd570…

MALICIOUS

PDF

51.1 KB Created: 2021-06-09 07:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82c7fca6f1df17a220608d51b0ed9d2b SHA-1: 3c72fa89a518127e7fd8c9404f22341c201e20d0 SHA-256: 2006bc44531bd570eed118c511fa1a08bed1761f882bf54e7a045da61c80910b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to free game item generators, which are identified as malicious redirectors and link farms. The document body, though partially corrupted, contains text related to 'Roblox Hack Site No Verification' and a URL pointing to a known malicious redirector. The presence of multiple external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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 https://netcdn.tw/app/431946152/roblox-hack-site-no-verification-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/cheat-terminal-railway-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-daily-free-spins-on-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_004_off000052a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A2 36320 bytes
SHA-256: 98d4a8c77c6523db56518b5f5fa8a054f21eee8bc35d2df33c48223af3ff73fa
font_01_sfnt_off0000a49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49B 18540 bytes
SHA-256: a5027356c4c6eae29b8818f0dd1c0a3bb0c150be01afe98087f1d4b18e5bf87a

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