Malicious PDF — malware analysis report

Static analysis result for SHA-256 357aa188d50cc692…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 05:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 544973cceb1efa554d96b348fed1be57 SHA-1: b0322650c4cc697b52548236907ec84a9d65d109 SHA-256: 357aa188d50cc69252110fd412fe7bcd28e2ed0f3301ee1b500eda3d7addb5a3
160 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL likely leads to a second-stage download or further redirection, typical of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-games-download-free-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-heaven-free-spins-link_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_off000054cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CC 25528 bytes
SHA-256: eb24e8f5007cf0cb8250608d9f14853d43a62e53658ec4943d18944d84b904a0
font_01_sfnt_off00009079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9079 18548 bytes
SHA-256: bf0010eea28238cadeb536793d42f80382de1e22dde51f6e5fd1d23f73abc266

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