Malicious PDF — malware analysis report

Static analysis result for SHA-256 df42e506807a6c86…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 09:18:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 510dbb6222e6afd83a31a4517345afe3 SHA-1: 6c1bf545f4c174b9c819ece8ece0875e597a30ca SHA-256: df42e506807a6c869ed248a4e60812f39071a1477ec7f903399f05c39f10c98c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, disguised as a 'Coin Master Hack'. The document body and embedded links suggest a lure for users seeking free in-game items, which is a common tactic for phishing or malware distribution. The presence of multiple redirector links increases the likelihood of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-2021-no-human-verification-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robux-today_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-on-coin-master_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
stream_004_off00004f8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8F 24016 bytes
SHA-256: 39c7b47bc5beb05191c9b8ff9b40342f473c9a93de3e6630f2a9f714ea8a22aa
font_01_sfnt_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 18652 bytes
SHA-256: b8f105c40d85849bb980b8b1f3fc80cc73964bf3899fc8976168334accd52214

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