Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08f42c674d1d26d…

MALICIOUS

PDF

33.3 KB Created: 2021-07-08 09:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f09a4e35e1d07b25800477480f7c7ae4 SHA-1: c98a6f553228317a314635a36499b92fe247e8d5 SHA-256: f08f42c674d1d26d2debdb8f73ce97789f06383c68ffe438f0430377ab28b334
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple links that redirect to known malicious infrastructure, specifically advertising game hacks and free currency for games like Coin Master and Roblox. The document body and heuristics confirm a lure-based attack pattern designed to trick users into visiting these malicious sites. While no scripts were directly extracted, the nature of the links and the heuristic firings suggest a potential for further exploitation or download of malicious payloads.

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-coins-and-spins-in-coin-master-game-hack In PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/hack-voler-sur-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-easy-no-verification_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/veichle-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002cd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD8 22628 bytes
SHA-256: 0d3cafb4814e58a06b6b5768cb41f09339dce8d8d7fda307274351d2f3676103
font_01_sfnt_off00005f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 18348 bytes
SHA-256: 3394dff2a2236ff5ebd01f8571ec2988f1167f0416feeddb65e6ed7fa563ded8

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