Malicious PDF — malware analysis report

Static analysis result for SHA-256 a213049314cbb86a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 10:16:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1c1ad2c9a3958b084418ab622a911f90 SHA-1: 1adf73f4924ec15be7b42da99aefa4210b84912a SHA-256: a213049314cbb86a33fede62c26c078bf59f918a3ed1c36bbce0e581b85a492d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that promise free game hacks and cheats for popular games like Roblox. The document body and heuristics indicate a lure to download potentially malicious content disguised as game cheats. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/roblox-grinding-cheat-game-hack In PDF document text
    • https://www.tw-storage.com.tw/upload/files/hack-roblox-boogy_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-unused-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/roblox-content-deleted-pants-free_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/invisible-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/murder-mysstery-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-promo-codes-list-roblox_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/hack-para-anime-cross-roblox_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-hack-account_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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 22320 bytes
SHA-256: f4d113356a291f3eb9bb7d04c2eee588911872b1ee298183988e9e9a213d62d9
font_01_sfnt_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 19048 bytes
SHA-256: 4c00649144d940ce1cd5f1803c104782a8a6b62eee49d93ffe9ba48086bf2694

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