Malicious PDF — malware analysis report

Static analysis result for SHA-256 badc0ad6589059af…

MALICIOUS

PDF

36.0 KB Created: 2021-07-09 01:40:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d276c01988751b2b06e9d02c74b2f2de SHA-1: 99d3f7d3a49db2444f7d9e7c59923835a0640b0d SHA-256: badc0ad6589059af09edeeab5ba6b3922b240e577f17db28ac4d8705cabde4b4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as 'free generator' or 'game hack' lures, specifically mentioning 'free Robux'. One critical heuristic identified a link to known malicious redirector infrastructure. Another heuristic flagged a URI pointing to a raw IP address, which is often used to evade domain-based detection. The document body reinforces this by containing numerous URLs related to game hacks and free currency, suggesting a phishing or malware distribution scheme.

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-get-free-robux-easy-2021-game-hack In PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfPDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-money-in-mad-city-in-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-tiktok-likes-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/optifine-mcpe_GM479516143.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_off000032dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DD 22836 bytes
SHA-256: 324df7f1f8009ae3f10c9aed9c6b4ed58d5e1966522965794efddeeea9304395
font_01_sfnt_off000065d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 19568 bytes
SHA-256: 6047aacc591c706ba05485d06cfe5ae263460dd3f24b02a1ffd0afe45eaea607

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