Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba759faf67c9af5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 00:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e8b1c159070719e922663bbe42480209 SHA-1: 79feb88d505388c56e87fe8a925f8bcca2df0139 SHA-256: 9ba759faf67c9af588557aaaf6158f3c365c9e1f7ad786255c6ada338b40fd49
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, identified as malicious. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for distributing malware. While no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect the user to a malicious site, likely for further exploitation or payload delivery.

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/free-spins-coin-master-links-blogger-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/get-free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-generator-online-free_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-hack-dll_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-help-to-remove-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/can-u-hack-roblox-and-get-banned_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hack-robux-android-fast_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-noob-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/games-on-roblox-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-character-clothing-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/fre-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/get-free-spins-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
font_00_sfnt_off00003284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3284 22712 bytes
SHA-256: 47973950de1a19a64130435cc987aa9930a562b0185a9d9bef1de43444187cb6
font_01_sfnt_off0000656c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 18632 bytes
SHA-256: 3bd5d70d92567c4e9fdab6ab0c4abb83fff73585d00d870a94bf54a7db3788b5

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