Malicious PDF — malware analysis report

Static analysis result for SHA-256 9702a57e479dc712…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 11:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c4ac86d0177aed16d1d440cde1921f0b SHA-1: 6d1226a93e5df60e2861e7e81489b1b4681fdf08 SHA-256: 9702a57e479dc712d4019861d158addda9fa6422ef34c03551bd2200f3dfe787
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure, designed to lure users with promises of game hacks and free currency. The document body and heuristics indicate a phishing or malware distribution attempt, likely leveraging a social engineering tactic related to popular online games. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/431946152/how-to-hack-roblox-to-get-free-robux-game-hack In PDF document text
    • http://118.98.227.172/opac/repository/free-likes-for-tiktok_GM835599320.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/supreme-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-theme-park-tycoon-2-money-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-shovocado-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-knife-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hacker-news-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/top3k-roblox-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/www-roblox-com-play-for-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/2021-free-robux-windows-8_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-a-roblox-account-with-hashes_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-in-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-accounts-full-with-roebucks_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-cheat-engine-money_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/appcatch-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coment-installer-un-cheat-roblox-bee-swarm-simulator-miel-infini_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-account-generator-with-pin_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/youtube-roblox-jailbreak-hacks_GM431946152.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_off00003043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3043 23204 bytes
SHA-256: 484561be43e07a699a899fa0c497fb49e059c1ebb9c321b0c2f25c6d672985cf
font_01_sfnt_off0000647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 19228 bytes
SHA-256: bcb228600d1876164d47ff19adbc225d1b3379d908d021e666a2e799a71a81d1

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