Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c7769ad77ae481…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 06:23:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9e9ba706d9383e53f5558b20c50a9f9e SHA-1: 7669b0d959812c61f2804480172e4957929828e5 SHA-256: 43c7769ad77ae481da4831428c1f5316c6f4589ed438de749e97590fb3e237e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The primary malicious link, https://netcdn.online/app/406889139/coin-master-hack-spin-160-pro-game-hack, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and download prompts, reinforcing the lure. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly indicate a phishing or social engineering attack aimed at tricking users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-spin-160-pro-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-60fps_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-from-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_off00005301.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5301 30640 bytes
SHA-256: bd29796aa841dbb1e21fbc3d2c0f3da188ed63447ae5de4203af2c7a5b2041c8
font_01_sfnt_off0000968e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968E 18492 bytes
SHA-256: 3c129696237f8a4998e60350049cab20723f357d88a2f9c142381212d91e6ef9

Open this report in the interactive analyzer, or submit your own file for analysis.