Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42b640ce0601621…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 10:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b9e9b6dc35b775dcf7bf09a14d9f1eb4 SHA-1: 6d3e3202867a23419e119111133e46b8eda5506e SHA-256: e42b640ce060162141dc2d07463f8716582827406f3e192240ccf8322a2b5998
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The primary malicious link identified is https://netcdn.xyz/app/431946152/microsoft-bing-free-robux-game-hack. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at directing users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/microsoft-bing-free-robux-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robux-game-com_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DC 29664 bytes
SHA-256: 456104e2f8f0f4febade7d88e822fffc96c3fead6009ab18e8b3c5ac3e484d40
font_01_sfnt_off00008be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE3 18720 bytes
SHA-256: f6da71d3ec7876d1f2450260025b1db4712d77c7886386833aafb50cc2347919

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