Malicious PDF — malware analysis report

Static analysis result for SHA-256 556fbdf5628af6af…

MALICIOUS

PDF

23.8 KB Created: 2021-06-10 12:59:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ad5f5cf3d89397cfc7db779a506eff9d SHA-1: baa318fe3ed0cdc649864ae5e5fd5e3fc0560698 SHA-256: 556fbdf5628af6af595f7bcec82858f52c57283e14e8345d289f7777454f4802
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users into clicking on what appears to be a free game hack or generator. The primary link redirects to malicious infrastructure, and the document body itself is heavily obfuscated, suggesting an attempt to conceal its malicious intent. The presence of numerous external PDF links further indicates a link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/free-unlimited-robux-hack-working-2021-game-hack In PDF document text
    • https://au-ma.com/image/data/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-and-tix-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/pokemon-go-no-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://au-ma.com/image/data/files/pokemon-go-free-or-not_GM1094591345.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/get-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text

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