Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67a31347d9072f7…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 19:18:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a4d862b4bc07311fe7c4500813426e24 SHA-1: d685ee17454ca78228713514f45c66644e058b7a SHA-256: d67a31347d9072f74bbb2a58566393548e48c06df5380126c69781679fe9e3aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a lure for game hacks and generators. The presence of a visual download button further supports a phishing or scam attempt. While no scripts were directly extracted, the document's structure and embedded URLs strongly suggest it's designed to redirect users to potentially malicious sites for further exploitation or credential harvesting.

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.co/app/431946152/counter-blox-roblox-offensive-hack-script-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-candy-roblox-id_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cheat-bar-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/22-500-robux-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cone-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-use-skidama-level-7-roblox-hacks_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
font_00_sfnt_off00002ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE7 21796 bytes
SHA-256: 1b6c924bb68a70de1665e61521c513a6618be63d174d8b35a3bc1abd410e4ac3
font_01_sfnt_off00005ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 19308 bytes
SHA-256: cb6fbdc3f17cc7195ebc7ef1707823da72a9ead4c74afb358b13ded438590581

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