Malicious PDF — malware analysis report

Static analysis result for SHA-256 856c3cb6feb2e901…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 02:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6d768725d48aa73ea2e4cb91c01c63dc SHA-1: b05795f01fef1789edade9cc5322aab4a158d284 SHA-256: 856c3cb6feb2e90127c206273e96c6a7227287f897f6d8c1942d920de4a05dfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The heuristic firings confirm that the PDF links to known malicious redirectors and uses a lure related to game hacks. Although no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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/479516143/minecraft-realms-free-game-hack In PDF document text
    • http://gamixpaliwa.pl/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/robux-rewards_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-spins-free-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
stream_003_off00004c31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C31 25416 bytes
SHA-256: 023dcc21acba0e0e3dc5827e7c6078be1d3a4e09724b833a871ef9de83c42bfe
font_01_sfnt_off0000863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 17900 bytes
SHA-256: badbc394cd8954733b164be5cc8c6ff402afbb9d7774d644eb4a8191a91f4c18

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