Malicious PDF — malware analysis report

Static analysis result for SHA-256 436ec9e1b0f26946…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 10:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c06608d9d9ee7c0445d2d71304902b88 SHA-1: 0944cfca75a9a89bbe68e997d11c7338b8dcd6e7 SHA-256: 436ec9e1b0f26946646992c12e292420b882ff76091828f659ede4d928b8ec86
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, specifically advertising 'free generator / game hack' lures for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing attachment, with the embedded links designed to trick users into visiting malicious 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.tw/app/431946152/roblox-pink-free-robux-game-hack In PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-fly-hack-download-free_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-hack-clothes_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/robux-hack-2021-febuary-11_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/free-robux-group_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/pubg-uc-ykleme_GM1330123889.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/pokediger1-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.indigo-imaging.com/Public/upload/editorfiles/spin-coin-master-free_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_off00002fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB 21844 bytes
SHA-256: f36e4165e92a32f2f671274d42845fd88d3524ae4921e994faa427594876b6f5
font_01_sfnt_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 19236 bytes
SHA-256: 7f3ae533f1b20c2c9ad227d8ec2a812f6ca4ef2a098c849ad4932b76dc1c09fe

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