Malicious PDF — malware analysis report

Static analysis result for SHA-256 28744a70c4ec72bb…

MALICIOUS

PDF

41.2 KB Created: 2021-05-19 09:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 60eca47a282f45521e7e158ab6c231ad SHA-1: a7af50b63fd14a716f89de98f2bc2636270f3e77 SHA-256: 28744a70c4ec72bb22e416be34c8134218bbf151db49c004e357a79e103fe8d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting a 'Coin Master Free Spins Generator' lure. The heuristic firings indicate that these links point to known malicious redirectors and are designed to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-generator-no-verification-game-hack In PDF document text
    • https://www.roltechnik.hu/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/spin-coin_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/hack-a-game_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.roltechnik.hu/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/get-free-robux-no-human-verification_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_003_off00004805.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4805 24212 bytes
SHA-256: 8080bb0669ed78fcba0d6513dd83242c67c7c89618dce526423e194d6eb241a2
font_01_sfnt_off00007f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F50 18020 bytes
SHA-256: cc763048b76c9189c14999db918bcac9f3f262aeea1a03aaf6cd39ac3f323e93

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