Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63d4a54802ea6d6…

MALICIOUS

PDF

50.5 KB Created: 2021-06-03 05:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7a9307dd30227e31faa69f30f9941c66 SHA-1: e85a7e1ed2ce4768d5bc95c3437c1c91c185bc67 SHA-256: a63d4a54802ea6d667abac24cf9dcefe2e19760dff381b44dfdd20e6afb8f6f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier strongly flagged this PDF as malicious. The presence of multiple redirector links and the lure content suggest an attempt to lead the user to a compromised site or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/479516143/minecraft-bedrock-hacks-game-hack In PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/hack-download-for-btools-roblox_GM431946152.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://opac.b2p2vrp.litbang.kemkes.go.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5334 26080 bytes
SHA-256: 39a8808d2b7da702a80fcbf84b5eaf500591127a03b8d3e932132400a1731710
font_01_sfnt_off00008e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2B 3020 bytes
SHA-256: eedce20c19bed174ebe453a0c0095ca54ef1c0cf763914f699a20348cea05fc2
font_02_sfnt_off0000987f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x987F 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA290 18268 bytes
SHA-256: cdc10c07562964e95d3c60cab3c6d937b43618c1a43ea86bc4060c2923515875

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