Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dac78a72a5bd4f9…

MALICIOUS

PDF

47.1 KB Created: 2021-06-07 15:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a70709bbdb29a9c685e68c98382661ef SHA-1: fd6f9cb4198579314c859abfa01b3128a67efee1 SHA-256: 0dac78a72a5bd4f9dd408ba42ac081cd366a6032ccada8486254715679dd5f48
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as "free Robux" generators and game hacks. The document body and embedded links strongly suggest a lure to trick users into visiting malicious sites, likely for further payload delivery or phishing. The presence of multiple redirector links and the ML classifier output indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/how-to-get-25-robux-for-free-game-hack In PDF document text
    • http://io24.com.ar/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-ghost_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-accounts-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005204.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5204 24576 bytes
SHA-256: c64577d19d16ad943f751a81b4e4b5b2e3da3149361eedf61dd413b40f093739
font_01_sfnt_off00008a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 2896 bytes
SHA-256: c36d2cb6099ad4fae573485dcdeea5e8bce2dc409ad1d05a849d573100f96601
font_02_sfnt_off00009463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9463 18540 bytes
SHA-256: d57dd18b2f64b1ab251231f93df5d2b88a74fb23424c5a2cccfc49274788e8e8

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