Malicious PDF — malware analysis report

Static analysis result for SHA-256 0728381fa73f0ecf…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 04:16:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db83b05bd37e162ed4d72e893db35304 SHA-1: 87f03db13ad7a5f9e84723472c00406f4a9ec2fa SHA-256: 0728381fa73f0ecf9bd3e3faef35d4324b90ef861eea3f918c031a56ae5dac3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and hosts further malicious PDFs, masquerading as game hacks and cheats. The primary lure is a 'free generator / game hack' for Minecraft, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious workflow designed to redirect users to potentially harmful content.

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.online/app/479516143/minecraft-hacks-xbox-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-23-march-2021_GM406889139.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_off0000500f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x500F 26244 bytes
SHA-256: 9f0760790e82cd42d835131ec99b9e0456808c21471adca736d83bc8557fc14b
font_01_sfnt_off00008b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8A 18476 bytes
SHA-256: 08d143bbdffcf64d63a65049f265cbb68e766144a512c2d0a1cb0386676e8729

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