Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8fe7d90911eecd…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 03:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2e6f4d0f7ead14275bc94184fb5e1ebf SHA-1: 7f36cc60d4fde9dfcea36ac9ab4ebbadb03ba48f SHA-256: 2c8fe7d90911eecd6f3aed15f777f2ed082f9a480c799a2811a04c6835adbdd1
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body also contains numerous URLs related to game hacks and free in-game currency, reinforcing the lure. The presence of malformed streams and ML classification further indicate malicious intent. The primary attack vector appears to be social engineering via a malicious attachment, leading users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 http://netcdn.co/app/431946152/roblox-skyline-hack-game-hack In PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-codes-live-youtube_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/i-give-free-robux-for-get-my-clothes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-jailbreak-airdrop-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-camera-not-activating-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/hack-coin-master-free_GM406889139.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
font_00_sfnt_off00003057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3057 22448 bytes
SHA-256: 9004273dfd06d757ff0ea951a430fe9b3e5c0d99bfbe1b6ee5887775f382620d
font_01_sfnt_off00006260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 18956 bytes
SHA-256: 749d310dffc98f5ae27bbbb7953b3708ca6318a4962d005ced8e646777af78bf

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