Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d9f2b3243812e0…

MALICIOUS

PDF

39.0 KB Created: 2021-05-21 15:52:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 11b90cb4c8e5b45c7a14c2caab664e23 SHA-1: 09cdd10e9755f7567add4c8e538ed2fa3544a4f9 SHA-256: 94d9f2b3243812e01a6bb30c3a629970e3bdc61ea1d75a25dd65fce24403641d
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game currency and hacks, directing users to malicious redirector URLs. The document body contains multiple links to sites promising free Robux and other in-game items, which are likely part of a phishing or malware distribution scheme. The presence of multiple malicious redirector links and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/431946152/how-to-make-free-robux-game-hack In PDF document text
    • http://m-sv.net/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-with-no-survey_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_002_off000032e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E2 24792 bytes
SHA-256: fdd89ad62d4b8886919ea8abc40bee3d3ddeb9670de6ad9c1dd8ba0850290b99
font_01_sfnt_off00006b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off0000754b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 18772 bytes
SHA-256: bc975d0cd3d1d09474d4302e54d359df6d5266f7e81f0636855fd998b44c4aca

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