Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c55624613d00744…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 15:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c9805bafbd18dc48454df94eaae2ee4 SHA-1: 6a19844f653225ada68acc4d04ad89d63843e172 SHA-256: 4c55624613d007447121694beb3b65718369a882af8abae7762a7c625eb44c79
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and pages promising free game currency or hacks, such as 'coin-master-hacksco-game-hack'. These links are flagged as malicious and part of a redirector infrastructure. The document body, though heavily obfuscated, also contains URLs that reinforce the lure of game-related exploits. The primary function appears to be directing users to potentially malicious sites that could lead to further compromise.

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 http://netcdn.tw/app/406889139/coin-master-hacksco-game-hack In PDF document text
    • http://new-era.com.tw/image/data/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-no-codes_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/youyube-how-to-get-free-robux-that-working_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-be-a-admin-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-tshirt-roblox-design_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hacks-bacon-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-can-u-get-robux-for-free_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_002_off00003203.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3203 23376 bytes
SHA-256: 42c5571dbfcabc6edaaa5cd29291f52fed100044f1199b7bd021bc866c0aa20e
font_01_sfnt_off000066de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7

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