Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f5057cf39fce48…

MALICIOUS

PDF

41.4 KB Created: 2021-05-21 00:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 411d1a568d7e37ec71e2d1d522e41e34 SHA-1: f07ac578a1a9972009f7801c5b7cbd344e6bebfa SHA-256: 18f5057cf39fce48a31ae45628f1fefd64ff2b2fd4da7d8a5f8c1adc3c39e84e
160 Risk Score

Malware Insights

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

This PDF document employs a lure for 'Free Robux' and 'game hacks' to entice users to click embedded links. The primary link redirects to malicious infrastructure, and multiple other PDF documents are referenced, suggesting a chain of malicious redirects or downloads. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8074

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/free-robux-real-2021-game-hack In PDF document text
    • http://mycookingpot.com/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-hack-someone-on-roblox_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_off0000332f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332F 28032 bytes
SHA-256: 429583858b3ab2ad1fd9ed6970586ca28758fc87fdded648cc7a2ffe5c759a3f
font_01_sfnt_off00007231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 3924 bytes
SHA-256: 07c64b3afb33be4a381404fe02e8bf5370913d363dea2d5b20c6b4a1f903e168
font_02_sfnt_off00007f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F01 18720 bytes
SHA-256: a03d25a6fa0cc118f86b8100faabbd8a2e80035a992cccb98ee09d3278d79c98

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