Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab9ba8f5458620e…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 20:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 65f61da2e30b6722922b06601f7d6938 SHA-1: afa4f504c6883df3d00d79f9ad937f4ea184bbf4 SHA-256: fab9ba8f5458620e12551f2af67412dfaf108fa217281b48dcb14eff42745125
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for popular games. The ML classifier strongly indicated maliciousness, and the document body, though partially corrupted, contains references to these lures and the malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

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-hack-online-android-game-hack In PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off0000453f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x453F 28688 bytes
SHA-256: 31b06d3bd79816ec44ade68a044b9f4f06945cbd678c4a8d10097844342eb92b
font_01_sfnt_off000085a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A6 17964 bytes
SHA-256: e085c742a6298e55fcde9a217167edad0f2b0c01ff8e5715ed5b8bb288dc9136

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