Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f196b57e843af22…

MALICIOUS

PDF

44.0 KB Created: 2021-06-08 21:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3450f9a3cba697ace8fc5c811abb8cba SHA-1: b4e84e9fdde22c9b15074042c36f56b16c6d17f6 SHA-256: 4f196b57e843af22bf5755b750b20475dbe312871f120085a525cfde4e4247b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service that promises free in-game currency, a common lure for phishing or scam operations. The heuristic findings indicate the PDF links to known malicious redirector infrastructure and is flagged by an ML classifier. Although no scripts were explicitly extracted, the document body contains embedded URLs that are part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/give-me-free-robux-for-roblox-game-hack In PDF document text
    • http://safwafurniture.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-robux-website-that-works_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/cute-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/free-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://safwafurniture.com/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://safwafurniture.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/game-toolbox_GM479516143.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
font_00_sfnt_off00004fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDD 24728 bytes
SHA-256: 5c9c81705db08eff22dd856141985d3d8117bb77b9daba7cb44eaec715df83d9
font_01_sfnt_off000088ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 18516 bytes
SHA-256: ca0e71da9569f883f4e7d11e14868f4148f638d759b647790a3a310b06932631

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