Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a839f1fbafe157…

MALICIOUS

PDF

33.9 KB Created: 2021-06-23 16:55:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d0b797f6022bba80276b57d5f738d161 SHA-1: f8cf77fc11c26b79d31b12539410a12ce6296035 SHA-256: 10a839f1fbafe1579eb48b271805ced28a32412601b4f5979024c7b56fa6aba6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'game hacks' or 'free generators', a common lure for malicious downloads. The heuristic firings confirm the presence of malicious redirector links and a general lure for game hacks. Although no scripts were explicitly extracted, the document body and heuristics indicate a high likelihood of the embedded links leading to a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/mobile-hack-roblox-game-hack In PDF document text
    • http://kermas.eu/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/roblox-free-bot-followers_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/como-tener-1-millon-de-robux-el-hacker-2021-pro_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-hack-roblox-bee-swar_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/newo-ico-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/cheat-engine-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-that-really-works_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/tuto-comment-installer-des-hacks-pour-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-hacks-fo-building-on-bloxburg-site-youtubecom_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/how-to-get-free-robux-2021-not-clickbait_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FED 21700 bytes
SHA-256: 661b2ff6a7c1eff23e67700f37c9a0f8519a7e23f4410b6d42508cbef557f750
font_01_sfnt_off00005f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 18972 bytes
SHA-256: 2d2a4b78da12f3192c334dfc553ba60e5cdd55620e6fe95ef0520cd19fb75e4d

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