Malicious PDF — malware analysis report

Static analysis result for SHA-256 86af2de244e0b77b…

MALICIOUS

PDF

48.3 KB Created: 2021-05-19 10:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 523e2b3ac71d8ea2fb0b99abdd71e124 SHA-1: decfdd9c7926d271f46e715f16cc16a993913e61 SHA-256: 86af2de244e0b77b33f1618ef6f5efad1651f5cf077cd1a89dfb4dc60f9466ab
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies the lure content. The embedded URLs likely lead to further malicious content or malware downloads, indicating a phishing or social engineering attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/roblox-people-girl-game-hack In PDF document text
    • http://bit-sky.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • http://bit-sky.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/mcpe-116_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/free-spins-on-coin-master-links-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EB 31256 bytes
SHA-256: 1ef191806db0f15f4a664040056968efaa1b89fa88a876229a3613083dadc2bf
font_01_sfnt_off0000913d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913D 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off00009ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE4 18232 bytes
SHA-256: 2c4b1e54e23ec6bbd5623f0337a8cca6ae55b6d4ff98ea4cc147b37d00c51703

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