Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d809eee459cac8…

MALICIOUS

PDF

46.9 KB Created: 2021-06-04 00:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6a1f11cdf5023c19f507500c8f9f5c1d SHA-1: 5e6539d04674410b58b05aa3614c8ebadecabb1f SHA-256: c3d809eee459cac88be11099b61ca5ba983d567d4fdc43e668fd737b53019c9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free generators'. The primary lure is a link to 'coin-master-hack-with-lucky-patcher-game-hack', which likely leads to a download of a second-stage payload. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-hack-with-lucky-patcher-game-hack In PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pokemon-go-free-quest-rewards_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-10_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/real-coin-master-hack-2021_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_004_off0000505a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505A 24304 bytes
SHA-256: c0bd13bc29a572ebe40678682e0fd49497dac9962a3e2b83cfde84026e833fa1
font_01_sfnt_off000087f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F7 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off000093e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E3 18552 bytes
SHA-256: 0dcb3a2c40d52ee7866e827a4899733df9c94cbb58243ba2d3547582b3d1f053

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