Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11fa2d5498ab5b9…

MALICIOUS

PDF

47.3 KB Created: 2021-05-11 06:38:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f9fe4f5168464f6cea82727b366b3037 SHA-1: 547eff4b366006c1fd17c25df2a1d1b392966747 SHA-256: e11fa2d5498ab5b9a8f6095d37249022fbe76cb710aa576795bae84893cebc81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' to lure users. The document body and heuristics indicate a social engineering tactic to trick users into visiting a potentially harmful URL. No scripts were extracted, but the primary attack vector is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/is-roblox-hacked-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A5 29420 bytes
SHA-256: 3792a7db8813ac214e3308d68f323eeecc923ab26429666d1f2e0040a725a05d
font_01_sfnt_off00008c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off0000963d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963D 18356 bytes
SHA-256: 0354344844298af16afd5a2e6ef08903fcba0fe1bf138aeb333889556374cdd5

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