Malicious PDF — malware analysis report

Static analysis result for SHA-256 3887707d42bcf238…

MALICIOUS

PDF

34.4 KB Created: 2021-06-22 16:58:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 03a1172b63a895bc0cb67f980961b824 SHA-1: 209ece8e6b426134b51f4885a64d01befa4cd995 SHA-256: 3887707d42bcf2383d0bb215397602f70e1b9c15261380a0f6d9de8edf902126
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator / game hack'. The document body explicitly mentions 'How To Get Free Robux' and includes the malicious URL, indicating a lure for users seeking in-game currency. The presence of these links and the lure strongly suggests a phishing or scam attempt to redirect users to potentially harmful sites.

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/how-to-get-free-robux-on-iphone-6s-game-hack In PDF document text
    • https://www.astrospace.com.tw/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/nuevo-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-websites-no-human-verification_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_off00002f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F27 22104 bytes
SHA-256: e5285a0e646595b049eb9e7dd59961f88e6386f14ab63171553e060e253a6f58
font_01_sfnt_off0000603a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 19492 bytes
SHA-256: 5edfb085fa6b15ccc06d182c2c203eff90b5971b07226395814ae8e648917f9e

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