Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa5951467988d70…

MALICIOUS

PDF

33.1 KB Created: 2021-06-25 19:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2eedcbf8ce88ee98b0c2a5e27039dfa6 SHA-1: 15f9e3aa555ae331bcfdf38d0bc6a75571cf6f5c SHA-256: 8fa5951467988d70a216a1de468beabc41deb595e1286de1048933edcc516858
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for a 'game hack generator' which redirects to malicious infrastructure. The embedded URL `http://netcdn.co/app/431946152/comment-se-faire-hacker-dans-roblox-game-hack` is flagged as a malicious redirector. The document body also contains numerous links to other potentially malicious PDF files hosted on `3qblocks.com.tw`, suggesting a campaign distributing lures for in-game currency or cheats. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/comment-se-faire-hacker-dans-roblox-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/tiktok-free-use_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-all-need-is-user-name_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/noob-vs-pro-vs-hacker-vs-god-w-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/daily-reward-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-cheat-in-roblox-glitch_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-ps4-free_GM479516143.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_001_off00002a90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A90 22124 bytes
SHA-256: df96598b00dcd870ed812eedc9a56aa89b633907ed0f98ce28a824997c99163b
font_01_sfnt_off00005b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 19472 bytes
SHA-256: eacd37f2fa2b429bf55ad1553cc5e7342f88686c60cff8f660542d5b4c9c1fd6

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