Malicious PDF — malware analysis report

Static analysis result for SHA-256 3735ff7db1b24865…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 14:30:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d2f98d8df924c23ba215344a524b53ae SHA-1: 09c8bfe520934d637a5bb95503589aabb12540c0 SHA-256: 3735ff7db1b248651bc39cc6af69b326efa394c21ff1716702b60a29b11c9306
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free in-game currency or hacks. The primary link directs to a known malicious redirector infrastructure. The document's content and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to further malicious sites or potentially download further malware.

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/coin-master-free-spins-no-verification-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-yeyeyeyyeye_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/best-app-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/master-game_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/new-roblox-logog-gives-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/growbox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/get-free-group-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-is-getting-hacked_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-roblox-lego-hack_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-legi_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-bandit-simulator-hack_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/pubg-uc-price-in-bd_GM1330123889.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/funbloxxyz-free-robux_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
stream_002_off000031af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AF 23300 bytes
SHA-256: 7d5c3c3f0eeb82800d33fc7080f0d6ea9ef2170325d57e0e0f8c64cf18bbdba0
font_01_sfnt_off00006640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 18308 bytes
SHA-256: 42457c8aa36706a76da82de2a9fa58b5f47e8340d8044d1afd54e96084de47f1

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