Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0113088eb3bbf66…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 08:15:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b48b5c9e183e3a43eb39d2de534f43b5 SHA-1: 0ab0796631e475a3b6b7f10b0dc5ff050461aeb8 SHA-256: a0113088eb3bbf6697352845253171fb4f75b7fb73420c5f99f892e19b25c7e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free currency' to lure users. The primary redirector URL is https://netcdn.xyz/app/1094591345/pokemon-go-free-download-for-pc-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow 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/1094591345/pokemon-go-free-download-for-pc-game-hack In PDF document text
    • https://www.manmed.info:443/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/i-need-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-master_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-earner_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spin-coin-master-game_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
stream_003_off00004854.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4854 24256 bytes
SHA-256: 208607b591b9f019d8af44e53f2600f4f7f77cee26f396def606edfc4392a378
font_01_sfnt_off00007fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 18648 bytes
SHA-256: d7d589f30951aac9a0de8dad7494e4d65d2918260e63304dafee4d9a6c218836

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